If the car is initially moving at a speed of 45 mi/h and it takes 300 ft to stop with uniform acceleration after its brakes are applied, it will take 600 ft to stop under the same conditions.
This is because the deceleration is the same, but the initial velocity is halved.
Acceleration is the rate of change of velocity of an object with respect to time. It is a vector quantity which is defined as the rate of change of an object's velocity and is usually represented by the symbol a. Acceleration can be caused by a variety of factors, including external forces, changes in direction, or changes in speed. In physics, acceleration can be described as the rate of change of an object's velocity over a period of time.
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Two forces of magnitude 10N each . Their resultant is equal to 20N . Then angle between them is
Answer:
0°
Explanation:
refer to the attachment
hope this helps!
A company is looking for a new child-safe liquid to use for filling a thermometer. Scientists on the team argue that water with food coloring added would be a great substitute, but that the scale on the thermometer could not go below 4 °C (about 39 °F). What was their reasoning?
Group of answer choices
The color would change as the temperature dropped to low.
The water would solidify at 4°C, making it not work anymore.
The water that had been contracting as it cooled would start to expand.
The density of the water would become too great to support the column.
The water that had been contracting as it cooled would start to expand. Option C
What is the thermometric liquid?
We have to note that the liquid that we have inside the thermometer is what we call the thermometric liquid. This is the kind of liquid that would increase in volume or decrease in volume so that the temperature can be measured.
We must note that water has an anomalous behavior and this is one of the reasons that stops water from being used as a thermometric liquid. This is the fact that water would begin to expand at about 4 degrees centigrade.
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a solid uniform ball of mass m and radius r rolls without slipping down a ramp from height h. how fast is the ball going at the bottom of the ramp?
The ball will be moving at a velocity of 14.0 meters per second when it reaches the bottom of the ramp.
The velocity of the ball at the bottom of the ramp can be determined using the principle of conservation of energy. The potential energy of the ball at the top of the ramp will be converted into kinetic energy as it rolls down the ramp.
Potential energy = mgh
Kinetic energy = (1/2)mv²
At the bottom of the ramp, all of the potential energy has been converted into kinetic energy, so the equation can be written as:
mgh = (1/2)mv²
Solving for v, we have:
v = √(2gh)
where g is the acceleration due to gravity (9.8 m/s²). So, given the height h, we can calculate the velocity of the ball at the bottom of the ramp.
Let's assume the height of the ramp is h = 10 meters. Then, the velocity of the ball at the bottom of the ramp can be calculated as:
v = √(2gh) = √(2 × 9.8 m/s² × 10 m) = √(196 m²/s²) = 14.0 m/s
So, the ball will be moving at 14.0 meters per second when it reaches the bottom of the ramp.
It's important to note that the ball is rolling without slipping, meaning that its velocity is due to both its rotational motion and its translation. The velocity of the center of mass of the ball at the bottom of the ramp will be equal to the calculated velocity.
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In a food chain, the flow of energy and matter are depicted with an _____
Answer:
flujo de energia
Explanation:
determine the load indicated by the spring scale and the mass needed to balance the lever scale when the elevator moves upward with an acceleration of 1 m/s2.
The load indicated by the spring scale is equal to the mass times the acceleration, so the load indicated by the spring scale is 1 kg x 1 m/s2 = 1 kg.
What is acceleration?Acceleration is the rate of change of velocity of an object. It is the rate at which something speeds up or slows down, and is usually denoted by the variable 'a'. Acceleration can be positive, negative, or zero. Positive acceleration indicates an increase in velocity while negative acceleration indicates a decrease in velocity. Acceleration can be caused by a variety of external forces, such as gravity, friction, or thrust. It is also related to momentum, as an object with a greater mass will require more force to accelerate. In general, acceleration is measured in meters per second squared (m/s2).
The mass needed to balance the lever scale is equal to the load on the spring scale divided by the acceleration, so the mass needed to balance the lever scale is 1 kg/1 m/s2 = 1 kg.
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When a solid goes directly to a gas, which process amongst the following processes best describe the phase change?
(a) Sublimation
(b) Vaporization
(c) Condensation
(d) Deposition
(e) Melting
The correct option is A. Sublimation process amongst the When a solid goes directly to a gas.
Sublimation refers to the process of transforming a substance from its solid state directly into its gaseous state without passing through the intermediate liquid state. This occurs when the pressure of the substance's vapor is higher than the pressure of the surrounding atmosphere.
Sublimation is a physical phenomenon that occurs naturally in a number of substances, such as dry ice (solid carbon dioxide), mothballs (solid naphthalene), and snow (solid water). It is also used in various industrial processes, such as freeze-drying, where substances are dried by freezing them and then removing the ice through sublimation.
In psychology, sublimation refers to the redirection of an individual's impulses or desires into socially acceptable outlets, such as artistic or creative pursuits, instead of expressing them in destructive or harmful ways. Sigmund Freud, the founder of psychoanalysis, believed that sublimation was a healthy and adaptive defense mechanism.
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The process of boiling actually cools the water.
Is this true or false? Can someone explain what this actually means or why it does that? Makes no sense to me.
Answer:
Boiling is the process where liquid (water) changes to gas (vapor) directly by no cooling process. As it's boiling, heat is being continuously give continuously so how can cooling happen?
But in the another way this statement can be correct too as evaporation too changes liquid to gas but does cools the liquid as high energetic liquid particles are escaping while leaving down the low energetic particles causing cooling.
To sum it up, boiling doesn't make any cooling.
the weight exerts a moment of 1826 in.lb on his elbow at point e. what is the moment exerted by the same weight on his shoulder at point s?
The moment should exerted by the weight on his shoulder at point s is also 1826 in.lb.
This means that the weight exerts the same amount of torque on the shoulder as it does on the elbow.
The moment of a force is calculated by multiplying the force by the perpendicular distance between the force & the point where the moment is measured. Since the weight remains the same and the perpendicular distance between the weight and the shoulder and elbow are the same: the moment exerted by the weight on both points is equal. This is important information for understanding the mechanics of the body and how forces affect different points.
No picture is provided. However, the answer might still be relevant.
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We fear too little those events that will claim lives. A) accidentally. *B) undramatically. C) in the near future. D) one person at a time.
We fear too little for all those events that will claim lives undramatically.
Fear is an extremely unpleasant feeling that occurs when one perceives or recognizes a threat or danger. Fear results in physiological alterations that might result in behavioral responses like mounting an aggressive defence or running away from the threat.
Our physical, emotional, or let us consider psychological health may be at risk. While most of us have particular things that make us fearful, we can learn to be scared of almost anything that are around us.
Cortisol and adrenaline, two stress hormones, are released. Your heart rate and blood pressure rise. Your respiration quickens. Even your blood supply alters; blood actually moves out from your heart and towards your limbs, facilitating the initiation of punches or other physical attacks.
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Light of wavelength 575 nm falls on a double-slit and the third order bright fringe is seen at an angle of 6.5o. What is the separation between the double slits?
The separation between the double slits is 0.0506 mm.
What is interference?Interference in physics is a phenomena when two waves merge by adding their displacements at each and every point in space and time to produce a new wave that has a higher, lower, or identical amplitude.
The angular separation is = 6.5° = 6.5 × π/180
Wavelength of light is = 575 nm = 575 × 10⁻⁹ m
Let the separation between the double slits = d m.
Then;
6.5 × π/180 = 575 × 10⁻⁹/d
d = 5.06 × 10⁻⁶ meter
= 0.0506 mm.
Hence, the separation between the double slits is 0.0506 mm.
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suppose that an astronomical object that emits light with a rest wavelength of 500 nm is observed to have a wavelength of 400 nm, what is the speed of the object and in what direction is it moving?
The speed of the astronomical object is moving away from the observer at 261,922,999 m/s or approximately 87.37% of the speed of light and its direction is away from the observer.
The speed of the object can be calculated using the formula for the Doppler shift, which states that the observed wavelength (λ') of an object moving away from an observer is longer than the rest wavelength (λ) by a factor of (c+v)/(c-v), where c is the speed of light and v is the speed of the object.
The formula for the Doppler shift is:
λ' = (c+v)/(c-v) × λ
Where c is the speed of light, v is the speed of the object and λ and λ' are the rest wavelength and observed wavelength, respectively.
Given the rest wavelength of 500 nm and the observed wavelength of 400 nm, we can rearrange the formula to solve for v (speed of the object):
v = c × (λ/λ' - 1)/(λ/λ' + 1)
v = c × (500 nm/400 nm - 1)/(500 nm/400 nm + 1)
Using the value of the speed of light, c = 299792458 m/s, we can calculate the speed of the object as follows:
v = 299792458 m/s × (500 nm/400 nm - 1)/(500 nm/400 nm + 1)
v = 0.87 × 299792458 m/s = 261922999 m/s
Converting the speed in percentage:
261922999 / 299792458 × 100% = 87.37%
So, the speed of the object is 261,922,999 m/s or approximately 87.37% of the speed of light and is moving away from the observer.
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a student's calculation was found to have a 35.5 % error, and his experimental measurement was 15.6 cm. what are the two true/actual measurements?
A student's calculation was found to have a 35.5 % error, and his experimental measurement was 15.6 cm. The two true/actual measurements are 24.19 and 11.53.
Let x and y be the two possible real measurements, with x being less than 15.6 and y being more than 15.6.
x + 35.5% of x = 15.6
y-35.5% of y
35.5% as decimal is 0.355
x + 0.355x = 15.6 , and
y - 0.355y = 15.6
Solving
x + 0.355x = 15.6
1.355x = 15.6
x = [tex]\frac{15.6}{1.355}[/tex] = 11.53
Solving
y - 0.355x = 15.6
0.645y=15.6
0.645y = 15.6
y = 24.19
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find the boyant force acting on when submerged in mercey given the density of the density of the mercery is 13,600 kg/m^3
The buoyant force acting on the object submerged in mercury is 133,176 V N/m^3.
What is Buoyant force?
The buoyant force is caused by the pressure difference that exists between the top and the bottom of an object immersed in a fluid. The pressure at the bottom of the object is greater than the pressure at the top, due to the weight of the fluid above it. This difference in pressure creates an upward force, which is called the The buoyant force acting on the object submerged in mercury is 133,176 V N/m^3.
Buoyant force = weight of displaced fluid
The weight of the displaced fluid is equal to the density of the fluid times the volume of the displaced fluid times the acceleration due to gravity (9.81 m/s^2).
Let's assume that the object has a volume of V and a weight of W.
Since the object is submerged in mercury, the weight of the displaced mercury is equal to the weight of the object (W), so we can write:
Weight of displaced fluid = W
Density of mercury = 13,600 kg/m^3
Volume of displaced fluid = V
Acceleration due to gravity = 9.81 m/s^2
Therefore, the buoyant force acting on the object is:
Buoyant force = Weight of displaced fluid
= Density of fluid x Volume of displaced fluid x Acceleration due to gravity
= 13,600 kg/m^3 x V x 9.81 m/s^2
= 133,176 V N/m^3
So, the buoyant force acting on the object submerged in mercury is 133,176 V N/m^3.
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astronomers split up the ancient constellation of argo navis because it was too large to be useful as a celestial landmark. group of answer choices true false
True, astronomers split up the ancient constellation of argo navis because it was too large to be useful as a celestial landmark.
Why was Argo Navis a constellation but is no longer?
The only star design that was abandoned due to strictly practical considerations is Argo Navis; it was simply too large. So Nicolas Louis de Lacaille, a French astronomer, separated it into the constellations Carina, Puppis, and Vela in the year 1750.
Sir John Herschel suggested the complete dissolution and elimination of Argo Navis in 1841 and 1844. Despite this, the constellation and its component pieces continued to be used well into the 20th century. It was given the three-letter abbreviation Arg in 1922, along with the other constellations. In 1930, when the IAU established the 88 contemporary constellations, Carina, Puppis, and Vela were split up and demoted to a previous constellation.
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Calculate the Tangential Velocity of a ball with mass 0. 50 kg rolling in a circle with a radius of
0. 75m, if it makes a complete circle in 12s
The required tangential velocity of the ball with a mass of 0.50 kg rolling in a circle with a radius of 0.75 m and completing a circle in 12 secs is 0.4 m/s.
Any object moving along a circular path has a linear component to its speed called tangential velocity. When an object moves in a circular path at a distance r from the centre, then the body’s velocity is directed tangentially at any instant. This is termed tangential velocity.
The ball weighs m = 0.50 kg
r = 0.75 m is the radius of the circle
The time is taken by the ball to complete the circle, t = 12 secs
The tangential velocity is given as, v = 2πr/t,
v = 2π × 0.75/12 = 0.4 m/s
Thus, the required tangential velocity of the ball is calculated to be 0.4 m/s.
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a hammer (500 grams), a small parachute (21 grams), and a baseball (145 grams) are all dropped from a height of 25 meters. the hammer and baseball take about the same amount of time to fall. which statement describes the time it takes for the parachute to fall?
The parachute takes longer to fall because of greater air resistance describes the time it takes for the parachute to fall.
How does air resistance slow the fall rate of a parachute?
The drag force resists the downward movement of gravity, pushing the parachute back up. As the parachute falls, the drag increases until it just balances out the pull of gravity. At that point, the parachute stops speeding up and begins to fall at a steady speed.
Why does a parachute increase air resistance?
An open parachute increases the cross-sectional area of the falling skydiver and thus increases the amount of air resistance that he encounters (as observed in the animation below). Once the parachute is opened, the air resistance overwhelms the downward force of gravity.
How does air resistance affect fall time?
With air resistance, acceleration throughout a fall gets less than gravity (g) because air resistance affects the movement of the falling object by slowing it down.
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If the acceleration of an object is zero, its speed:_________
If the acceleration of an object is zero, its speed is constant.
In mechanics, acceleration is defined as the rate of change of the speed of an object regarding time. Basically,acceleration are considered as vector quantity (in that they have greatness and course). The direction of an object's acceleration is given by the direction of the net power following up on that item.
The magnitude of object's acceleration, as portrayed by Newton's Subsequent Regulation, is the consolidated impact of two causes: the net equilibrium of all outer powers acting onto that item — greatness is straightforwardly corresponding to this net coming about force; that item's mass, contingent upon the materials out of which it is made — extent is contrarily relative to the item's mass.
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An object accelerates uniformly from rest to a speed of50 meters per second in 5.0 seconds. The average speed ofthe object during the 5.0-second interval isA 5.0 m/sB 10 m/sC 25 m/sD 50 m/s
The average speed ofthe object during the 5.0-second interval is 25m/s.
The average speed of an object is calculated by taking the total distance traveled in a given time interval, and dividing it by the time interval. Average speed is used to measure the speed of a person, vehicle, or object over a given period of time. Average speed can also be used to compare the performance of different vehicles over the same distance.In this case, the object accelerates uniformly from rest to a speed of 50 m/s in 5.0 seconds.
The total distance traveled in this time interval is 250 meters
[tex]50 m/s * 5.0 s = 250 m[/tex]
The average speed of the object during the 5.0-second interval is then [tex]\frac{250 m }{ 5.0 s }= 25 m/s.[/tex]
Therefore,The average speed ofthe object during the 5.0-second interval is 25m/s.
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A runner dashes 248 m in a direction due North from the starting line (x; = 0 m). She then
turns around and runs due South back toward the starting line 97 m.
If both legs of this run take a total of 130 seconds, to the nearest tenth of a m/s, what is her
average velocity?
K
Her average velocity is 2.65 m/s to the nearest tenth of a m/s.
What is average velocity?The measure of average velocity is a vector. Average velocity is calculated by dividing the change in position or displacement (x) by the time intervals (t) during which the displacement takes place. Depending on the direction of the displacement, the average velocity may be positive or negative. Meters per second (m/s or ms-1) is the SI unit for average speed.
Only the object's displacement is considered when calculating average velocity. However, the displacement's size might differ from the actual path's length. For this reason, we use average speed to describe the rate of motion along a path.
Average speed is calculated by dividing the total distance travelled by the total motion time. The average speed is a scalar quantity, in contrast to the average velocity.
Given distance: 248
and = 345 m
Time for both= 130 s
We know that average velocity = Distance + Distance / time
Therefore,
Average velocity = (248 + 97) / (130)
Average velocity = 69/26
Average velocity = 2.65 m/s
Thus, her average velocity is 2.65 m/s to the nearest tenth of a m/s.
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Assuming the height of the hill is 50m calculate
(i)The velocity of the car at the bottom of the hill
(ii) The height at which it will have half this speed. Assume the car starts from west from the top of the hill
pls show all workings
(i ) The velocity of the car at the bottom of the hill is 31.3 m/s.
(ii) The height at which it will have half the speed is 12.5 m.
What is the velocity of the car at the bottom?
The velocity of the car at the bottom of the hill is calculated by applying the principle of conservation of energy as follows;
¹/₂mv² = mgh
v = √ (2 gh )
where;
h is the height of the hillg is gravityv = √ (2 x 9.8 x 50 )
v = 31.3 m/s
The height at which it will have half the speed is calculated as;
¹/₂v = ¹/₂ ( 31.3 m/s ) = 15.65 m/s
h = v² / 2g
h = ( 15.65² ) / ( 2 x 9.8 )
h = 12.5 m
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Two aluminum balls are 5 cm apart. One is
negatively charged, and the other is
positively charged. A small magnet is placed
between the two balls but is not touching
either of them. The aluminum balls remain
stationary. Which statement describes the
electric and magnetic fields?
Each ball has an electric field surrounding it, and the magnet creates a magnetic field as well.
What is an example of an electric field?The area of space surrounding an electrical charges particle or object within which the charged body perceives force is known as the electric field .Examples: -Electric fields are created by charges and their configurations, such as capacitor and battery cells.
In basic terms, what is an electric field?Each location in space at which a charge exists in any form can be regarded to have an electric field attached to it. The electrostatic force per mass unit is another name for an electric field. The electric field's equation is stated as E = F / Q.
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a tennis ball bounces on the floor. during each bounce, it loses 31 % of its energy due to heating. how high does the ball reach after the third bounce, if it is initially released 4 m from the floor?
The ball reaches a height of 1.38 m after the third bounce, if it is initially released 4 m from the floor.
What is height?
Height is a measurement of vertical distance or elevation. It is usually defined as the distance from a reference point, such as the ground or sea level, to a point of interest, such as the top of a building, a mountain, or an object. Height can be measured in various units, including meters, feet, and inches.
To find the height of the ball after the third bounce, we can calculate the height of the ball after each bounce and multiply by a factor that takes into account the loss of energy due to heating.
After the first bounce, the ball will lose 31% of its energy, so it will have only 69% of its initial energy. We can calculate the height of the ball after the first bounce by assuming that the ball's potential energy is equal to its initial height multiplied by its weight and subtracting the energy loss due to heating:
PE = mgh
h = PE / (mg)
h = (0.69 * 4 m * 9.8 m/s^2) / (0.06 kg * 9.8 m/s^2) = 2.86 m
After the second bounce, the ball will lose another 31% of its energy, so it will have only 69% of its energy after the first bounce. We can calculate the height of the ball after the second bounce using the same process:
h = (0.69 * 2.86 m * 9.8 m/s^2) / (0.06 kg * 9.8 m/s^2) = 2.01 m
After the third bounce, the ball will lose another 31% of its energy, so it will have only 69% of its energy after the second bounce. We can calculate the height of the ball after the third bounce using the same process:
h = (0.69 * 2.01 m * 9.8 m/s^2) / (0.06 kg * 9.8 m/s^2) = 1.38 m
So, the ball reaches a height of 1.38 m after the third bounce, if it is initially released 4 m from the floor.
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Peregrine falcons are known for their maneuvering ability. In a tight circular turn, a falcon can attain a centripetal acceleration 1.5 times the free-fall acceleration. What is the radius of the turn if the falcon is flying at 22 m/s ?
The radius of the turn for the falcon flying at 22 m/s is approximately equal to: radius ≈ 5.18 m.
The centripetal acceleration required for a tight circular turn can be calculated using the formula:
centripetal acceleration = velocity² / radius
where velocity is the speed of the falcon and radius is the radius of the turn.
Given that the centripetal acceleration is 1.5 times the free-fall acceleration (g), we can write:
centripetal acceleration = 1.5 × g = 1.5 × 9.8 m/s²
Substituting this value into the above equation and solving for the radius, we get:
radius = velocity² / centripetal acceleration = (22 m/s)² / (1.5 × 9.8 m/s²) = (22²) / (1.5 × 9.8) m.
So the radius of the turn for the falcon flying at 22 m/s is approximately equal to: radius ≈ 5.18 m.
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a stone is dropped from a height of 4.9 m . find the time taken to cover this distance
Answer:
Explanation:
Initital velocity = 0
s=1/2*g*[tex]t^{2}[/tex]
4/9 = 1/2*9.8 * [tex]t^{2}[/tex]
[tex]t^{2} =1\\t=1 sec[/tex]
the staples inside a stapler are kept in place by a spring with a relaxed length of 0.115 m. if the spring constant is 51.0 n/m, how much elastic potential energy is stored in the spring when its length is 0.150 m?
When the spring is 0.150 m long, it will have "0.312 J" of stored potential energy.
What is a spring's Hooke's Law constant?F = -kx. It gauges the stiffness of the spring. When a spring is stretched or compressed to a length that deviates by an amount x from its equilibrium length, it applies a force F = -kx in the direction of its equilibrium position.
According to the question.
Length, L = 0.115 m
Spring constant, k = 51.0 N/m
Now,
P.Eelastic = 1/2 kx²
P.Eelastic = 1/2 × (0.150 - 0,150)²
P.Eelastic = 0.01225 × 51 /2
P.Eelastic = 0,312J.
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a hollow metal sphere of radius r is positively charged. of the following distances from the center of the sphere, which location will have the greatest electric field strength?
The location that will have the greatest electric field strength is the surface of the sphere, which is a distance of r away from the center.
This is because the electric field strength is inversely proportional to the square of the distance from the source, so the closer you get to the source, the stronger the electric field will be.
An electric field is an area of influence created by an electric charge, in which electric force is exerted on other charged objects. This electric force is described mathematically by the electric field vector, which specifies the direction and magnitude of the force. Electric fields can be created by stationary charges, or by time-varying magnetic fields. Electric fields can be used to control the motion of charged objects, and are also responsible for many of the phenomena associated with electricity, such as electric potential, capacitance, and electric current.
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Radar waves of wavelength 50 mm are emitted from two aerials and create a fringe pattern 1 kilometer from the aerials. Calculate the distance between the aerials if the fringe spacing is 80 cm.
If the fringe spacing is 80 cm, the distance between the aerials is 6.25 meter.
What is interference?In physics, interference refers to the combined result of two or more wave trains travelling along intersecting or converging trajectories. The result is the result of adding the individual wave amplitudes at each place that is influenced by multiple waves.
Given: wavelength = 50 mm = 50 × 10⁻⁴ m
the fringe spacing is = 80 cm = 0.80 m.
x = λD/d
d = λD/x
= 50 × 10⁻⁴ × 1000/0.80 m
= 6.25 meter.
Hence, the distance between the aerials is 6.25 meter.
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a continuous line of charge lies along the x axis, extending from x 0 to positive infinity. the line carries a uniform linear charge density ?0 . what are the magnitude and direction of the electric field at the origin?
At the origin, the electric field has a magnitude of [tex]\frac{k\lambda_0}{x_0}[/tex] and is oriented in a positive x-direction.
Coulomb's law may be used to determine the size of the electric field at the origin caused by a continuous line of charge:
[tex]E = \frac{kq}{r^2}[/tex]
Using the superposition principle, the electric field owing to a differential element of charge dq is:
[tex]dE = \frac{k dq} {r^2}[/tex]
Because the differential charge element is proportional to the linear charge density and the differential length, [tex]dq = \lambda_0 dx[/tex]. Because the distance r from the origin to the differential element equals [tex]r = x_0 + x[/tex],
[tex]dE = \frac{k\lambda_0 dx}{(x_0 + x)^2}[/tex]
Integrating this formula from x = 0 to x = infinity yields the total electric field at the origin:
[tex]E = k\lambda_0 \int_{0}^{\infty} \frac{dx}{(x_0 + x)^2}[/tex] from 0 to infinity
Using partial fractions, the integral may be calculated as follows:
[tex]E = \frac{k\lambda_0}{x_0}[/tex]
The linear charge density and the distance x0 from the closest point on the line of charge are both inversely correlated with the electric field at the origin.
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the temperature of an object is raised by 120° Celsius the resulting increase in its absolute temperature is
The absolute temperature is 393 K
How do you obtain the absolute temperature?Absolute temperature is a temperature scale that starts at absolute zero, which is the temperature at which all matter has zero thermal energy. The most commonly used absolute temperature scale is the Kelvin scale. The conversion from Celsius or Fahrenheit to Kelvin can be done using the following formulas:
Kelvin = Celsius + 273
Here we would have that;
T = 120° Celsius + 273 = 393 K
This is the absolute temperature that we seek.
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3-h) a mass m of 4.7 lbm is attached to a light spring of k lbf /ft elongates it by 1.3 in. determine the spring stiffness k (in lbf /ft) and the natural frequency f (in hz) of the system.
The spring constant k (in lbf /ft) is 248.62 lbf/ft and the natural frequency f (in hz) of the system is 10.54 Hz.
Given the mass of object (m) = 4.7lbm
The elongation in spring (L) = 1.3inches
The spring constant of spring = k
We know that the force exerted on the spring is = F
We determine Fs = kL
The force on object (F) = mg
Fs = F then,
mg = kL such that:
k = (4.7 lbm * 32.2 ft/s^2) / (1.3 in) where 1 lbm * 32.2 ft/s2 = 1 lbf
k = 248.62 lbf/ft
The frequency of spring = f
f = 1 / (2π * √(m/k))
f = 1 / (2π * √(4.7 lbm / 248.62 lbf/ft))
f = 10.54 Hz
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