Answer:
mechanical energy is due to the position and the motion of an object in a system. A projectile moves in a curve. When the object leaves, it has mostly kinetic energy
Explanation:
On a swing, the ride starts with a push, giving you kinetic energy.
When the pendulum swings, its potential energy transforms into kinetic energy.While projectile energy transforms from kinetic energy to potential energy.
What is the difference between projectile and swing?
Swinging from a pendulum, such as a rope swing or a hanging vine, is more difficult than swinging from a cannonball projectile.
A type of motion in which an item moves along a bilaterally symmetrical, parabolic direction is known as projectile motion.
The path that the item takes is referred to as its trajectory. Projectile motion occurs only when a single force is supplied at the start of the trajectory, after which the only interference comes from gravity.
Because gravity is the sole force acting on a projectile while it is in the air, the total energy does not vary at any point in its travel,
The energy can change forms from kinetic energy, The energy of motion, to potential energy, or from potential energy to kinetic energy.
When the pendulum swings, its potential energy transforms into kinetic energy, which is then converted back to potential energy, which is then converted back to kinetic energy, and so on.
Let's try it with a tire swing as a pendulum to see how it works! All of the swing's mechanical energy is potential energy at its beginning location.
Hence when the pendulum swings, its potential energy transforms into kinetic energy. While projectile energy transforms from kinetic energy to potential energy.
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50 POINT PHYSICS QUESTION! PLEASE HELP!
A girl, standing on a bridge, throws a stone vertically downward with an initial velocity of 12.0 m/s, into the river below. If the stone hits the water 2.50 seconds later, what is the height of the bridge above the water?
Remember to identify all your data, write the equation, and show your work.
Answer: I solved it and got 30.65 meters.
Explanation: Pic Attached. Hope this helps.
Answer:
30.65
Explanation:
becuase i read the othe part
Pretty cool, the atoms that exist in your body are some of the same atoms that have existed since the beginning of the universe. You are made of star stuff. What scientist made this observation?
1) Neil Degrasse Tyson
2) Albert Einstein
3) Carl Sagan
Answer:
Your answer is option 3
Explanation:
The statement is that the atoms that exist in our body are the same number of atoms that existed at the beginning of the universe. This statement is said by Carl Sagan. Hence, option (3) is correct.
What is an atom?The atom is the smallest form of matter that can be separated without releasing particles with electrical charge. It is also the smallest material with chemical element-like properties. As a reason, the atom is the basic unit of chemistry.
The most of an atom is made up of space. The remainder consists of a cloud of electrons with negative charge orbiting a positive electrode nucleus composed of protons and neutrons. The nucleus is small and dense in comparison to electrons, the lowest charged particles in nature. Electric forces, which connect electrons to the nucleus of atoms, pull electrons to any positive charge.
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what are some of the uses of ultra-sound
Answer:
Ultrasound has been used in a variety of clinical settings, including obstetrics and gynecology, cardiology and cancer detection. The main advantage of ultrasound is that certain structures can be observed without using radiation. Ultrasound can also be done much faster than X-rays or other radiographic techniques
Answer:
Ultrasound can be used for various purposes like diagnosing conditions, including those in the heart, blood vessels, liver and more. Yet most commonly to monitor growth and development of a fetus. A echocardiogram is a ultrasound of the heart.
Explanation:
what equation demonstrates the law of conservation of mass
Answer:sorry i am only in 6 grade but this is a explanation
Explanation:Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.
A rock is dropped from a height of 3.4 m. How much time does it take to hit
the ground?
O .83 s
O 1.17 s
O 0.59 s
O 33.32 s
The United States has a_____ economy
A command
B. pure market
C. mixed market
D. central planned
Please select the best answer from the choices provided
Answer:
C
Explanation:
The United States has a mixed economy it works according to economic system that features characteristics in both capitalism and socialism it makes economy system protects some private properties and allows a level of economic freedom in the use of capital
Answer:
C. is Levi's fav letter
Explanation:
i thought that ray was ugly but NAH
Which term best explains why you hear an echo?
Answer:
reflection
Explanation:
Answer:
reflection
Explanation:
A p e x
What is a force ?????
Answer:
A force is a push or pull upon an object resulting from the objects interaction with another object
If the velocity of a moving object decreases from 60 m/s to 30 m/s, what happens to its momentum? (2 points) Group of answer choices It is reduced by half It doubles It stays the same It quadruples
Answer:
it is decreased by 1/2
Explanation:
The velocity of the moving object is reduced by half decreasing speed is also decreasing the momentum of a certain object.
Answer:
-1/2
Explanation:
Weight and mass are different because,
Answer:
Explanation:
The answer is [C]
Which arrow is the action and which arrow is the reaction?
Which of the following would double the resistance in a wire?
a. Double the mass of the wire
b. Double the length of the wire
c. Half the mass of the wire
d. Half the length of the wire
Answer:
b. Double the length of the wire
Explanation:
I just took the test.
When we Double the length of the wire would double the resistance in a wire would double. The correct option is B.
What is resistance?Resistance is the obstruction of electrons in an electrically conducting material.
The mathematical relation for variation in resistance with length is given by
R = ρ*L/A
where r is resistance
ρ is the resistivity constant for
L is the length of the wire
A is an area of the cross-section for the wire
As evident from the above relation that resistance is directly proportional to the length of the wire keeping other parameters constant
Thus, by Doubling the length of the wire the resistance of the wire will be doubled, therefore the correct answer is B.
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For which optical devices does d¡ always have a negative value?
A. A and B
B. A and D
C. Band D
D. B and C
Answer:
Explanation:
A i think
the compound sodium sulfide consists of a ratio of two sodium ions (Na^+) to one sulfide ion (s^2-). Wrote a chemical formula for this compound.
Answer:Na2S
Explanation:
Doing assignment
Hiking with 10-15 lb backpack can increase your calorie burn by how much
Explanation:
Just one 60 minute walk through tiny hills, with a 10 pound backpack, can consume over 600 calories because you weigh about 100 lbs. Lead to increasing the slope of such hills, and it would be equal to 800 calories for calorie burning.
You throw a ball straight up. You are extra strong feeling today. It takes 11 seconds for the ball to come back down.
a. How high did you throw it?
b. What was the initial speed you threw it at?
Answer:
A. 148.23 m
B. 2.75 m/s
Explanation:
The following data were obtained from the question:
Time of flight (T) = 11 s
Maximum height (h) =?
Initial velocity (u) =?
Next, we shall determine the time taken for the ball to get to the maximum height. This can be obtained as follow:
Time of flight (T) = 11 s
Time (t) to reach the maximum height =.?
T = 2t
11 = 2t
Divide both side by 2
t = 11/2
t = 5.5 s
NOTE: Time to reach the maximum height is the same as the time taken for the ball to fall back to the plane of projection.
A. Determination of the maximum height to which the ball was thrown.
Time (t) to reach maximum height = 5.5 s
Acceleration due to gravity (g) = 9.8 m/s²
Maximum height (h) =?
h = ½gt²
h = ½ × 9.8 × 5.5²
h = 4.9 × 30.25
h = 148.23 m
B. Determination of the initial velocity.
Maximum height (h) reached = 148.23 m
Acceleration due to gravity (g) = 9.8 m/s²
Initial velocity (u) =?
u² = h/2g
u² = 148.23 / (2 × 9.8)
u² = 148.23 / 19.6
Take the square root of both side
u = √(148.23 / 19.6)
u = 2.75 m/s
Help!!!!!!!!!!!!
Skill-related fitness goals include __________. A. cardiovascular fitness B. reaction time C. muscular endurance D. flexibility
Answer:
B. Reaction time
Explanation:
Don't have an explanation. Sorry!
whos still awake???
Answer:
definitely not me
Explanation:
why would I?
Two objects with the same mass move with the same speed but in opposite directions. Compare their kinetic energies.
A.
Kinetic energies are equal.
B.
Kinetic energies are opposite in magnitude.
C.
Kinetic energy of the higher object is greater.
D.
Kinetic energy of the lower object is greater.
Answer:
A. Kinetic energies are equal.
Explanation:
The kinetic energy of the bodies will be equal since the mass and speed are the same.
Kinetic energy is the energy due to the motion of a body.
Mathematically;
K.E = [tex]\frac{1}{2}[/tex] m v²
m is the mass
v is the speed
The kinetic energy is a scalar quantity with no regard for direction.
Answer:kinetic energies are equal
Explanation:
Need help with question 1) and 2) please ASAP ??? 15 points ?
A soccer ball was kicked off the roof of a building going
20m/s. It took 5 s for the soccer ball to hit the ground?
Find the vertical final velocity, the distance the ball
traveled horizontally, and the height the ball fell.
Answer:
Final vertical velocity = -29m/s
Horizontal distance = 100m
Height = 20.41m
Explanation:
1. The vertical final velocity can be calculated thus: vy = vyo - gt
Where;
vy = vertical velocity (m/s)
vyo = vertical initial velocity (20m/s)
g = acceleration due to gravity (9.8m/s²)
t = time (5s)
Hence, vy = vyo - gt
vy = 20 - (9.8 × 5)
vy = 20 - 49
vy = -29m/s
2. x = V0 x t
Where;
x = horizontal distance (m)
Vo = initial velocity
t = time (s)
x = 20 × 5
x = 100m
3. Maximum height = (voy)²/2g
= 20²/ 2 × 9.8
= 400/19.6
= 20.41m
Why is gravity so weird? .
Answer:
Why is gravity so weird? No force is more familiar than gravity — it's what keeps our feet on the ground, after all. And Einstein's theory of general relativity gives a mathematical formulation for gravity, describing it as a “warping” of space.
Answer:
Because it pulls us down to the centre the earth
Compared to the range of a bullet shot horizontally just above horizontal ground, a bullet shot from the same position at an angle of 30 degrees with the same initial velocity as the first bullet, would travel a horizontal distance that is-
a) the same
b) farther
c) not as far
d) the same, but will remain in the air longer
Answer:
b) farther
Explanation:
The range of the bullet shot horizontally just above the horizontal ground is given as;
[tex]R_1 = \frac{u^2sin(2\theta)}{g}[/tex]
where;
θ is the angle of projection with the horizontal ground = 0
R₁ = 0
The range of the bullet shot at an angle of 30 degrees with the same initial velocity as the first bullet is given as;
[tex]R_2 = \frac{u^2sin(2 \theta)}{g} \\\\R_2 = \frac{u^2sin(2*30)}{9.8}\\\\R_2 = 0.088u^2[/tex]
Therefore, the second bullet will travel a horizontal distance that is farther
In which situation is no work being done?
Answer:
procrastinating
Explanation:
procrastinating is when someone dose not want to do work
Explanation:
if force is applied but object do not move then
it is situation for no work done
How does the size of a bicycle tire affect the distance it will travel when it is pedaled in a certain number of times?
Answer:
No, the size of a bicycle tire will not affect the distance traveled when pedaling, unless you are talking about the limits of the range. ...Proportional, which means that changes in wheel diameter or gear ratio X will cause the bicycle to travel X times.
A 1800 kg car moves along a horizontal road at speed v₀ = 18.4 m/s. The road is wet, so the static friction coefficient between the tires and the road is only µ static = 0.188 and the kinetic friction coefficient is even lower, µ kinetic = 0.1316. The acceleration of gravity is 9.8 m/s². What is the shortest possible stopping distance for the car under such conditions? (neglect the reaction time of the driver and round your answer to 4 decimal places)
Answer:
The shortest possible distance is [tex]|s| = 91.9 \ m[/tex]
Explanation:
From the question we are told that
The mass of the car is [tex]m = 1800 \ kg[/tex]
The speed along the horizontal road is [tex]v_o =u = 18.4 \ m/s[/tex]
The static friction coefficient is [tex]\mu_s = 0.188[/tex]
The kinetic friction coefficient is [tex]\mu_k = 0.1316[/tex]
Generally the static frictional force acting on the car is mathematically represented as
[tex]F_f = m * g * \mu_s[/tex]
Generally the force propelling the car is mathematically represented as
[tex]F = m * a[/tex]
Here a is the maximum acceleration
at the point which the car stops ,
[tex]F = F_f[/tex]
=> [tex]m * g * \mu_s = ma[/tex]
=> [tex]g * \mu_s =a[/tex]
=> [tex]a = 9.8 * 0.188[/tex]
=> [tex]a = 1.8424 \ m/s^2[/tex]
Generally from kinematic equation
[tex]v^2 = u^2 + 2as[/tex]
Here v is the final velocity of the car and the value is zero given that the car comes to rest
So
[tex]0^2 = 18.4^2 + 2* 1.8424 s[/tex]
=> [tex]s = - \frac{18.4^2}{2 * 1.8424}[/tex]
=> [tex]|s| = 91.9 \ m[/tex]
A car travels for 10 seconds at 5 m/s. How much distance does it travel?
Create a flexibility workout using the 'Principle of Progression' over a four week period.
Answer:
You can go to youtub and search 4 week flexibility programs and use that and add the principle of progression.
Answer:
r
Explanation:
Sugar is a compound. Its formula is represented below. Use the periodic table to determine which elements are in sugar. Write the elements down.
16.) A person walks 4 meters east, then walks 3 meters north. Determine distance and
displacement.
Answer:
Long question good luck:)
Explanation:
Answer:7
Explanation:
because its the right answer