A 1000-kg car is travelling at 30 m/s (about 67 mph, for context). What is the car's momentum? If the driver then slams on the brakes, applying a force of 7,500 N, how long will it take the car to stop?
it will take the car 5 seconds to stop
The force exerted by a moving 100 kg object is 1,000 newtons. What is the acceleration of the object?
Answer:
10 m/s²
Explanation:
Force is the product of mass of an object and its acceleration
The formula is : F= m*a -----where m is mass and a is acceleration
Use the values given in the equation as;
F= m*a
1000 = 100 * a
1000/100 = a
10 = a
10 m/s² = a
Hi i need help. thNKS
Answer:
8
Explanation:
Groups go down, periods go across :)
A cartoon shows two friends watching an unoccupied car in free fall after it has rolled off a diff. One friend says to the other, "It goes from zero to sixty mphin about three seconds." Is this statement correct? (Note that 60 mph converts to 26.8 m/s.)
Answer:
The statement is not correct.
Explanation:
To know if the statement is correct, we shall determine the velocity of the car after 3 s. This is illustrated below.
Data obtained from the question include:
Initial velocity (u) = 0 m/s
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) = 3 s
Final velocity (v) =?
v = u + gt
v = 0 + (9.8 × 3)
v = 0 + 29.4
v = 29.4 m/s
Thus, the velocity of the car after 3 s is 29.4 m/s.
Hence, the statement made by the friend is not correct as the car has a falling velocity of 29.4 m/s after 3 s.
Use the computational model of a cannon and cannonball shown to answer the question below.
If the mass of the cannonball increases, and all other initial conditions stay the same, what would happen to the velocity and kinetic energy of the cannonball?
A. The velocity decreases, and the kinetic energy decreases.
B. The velocity decreases, and the kinetic energy increases.
C. The velocity increases, and the kinetic energy decreases.
D. The velocity increases, and the kinetic energy increases.
Answer:
It would be option B.
Explanation:
Option B. is the right answer because as the mass of the canon increases the kinetic energy will increase as well, but the will decrease due to its greater mass.
If the mass of the cannonball increases, and all other initial conditions stay the same, the velocity decreases, and the kinetic energy increases.
The kinetic energy of an object is the energy possessed by the object due to its motion.
[tex]K.E = \frac{1}{2} mv^2[/tex]
where;
m is the mass of the objectv is the velocity of the objectK.E is the kinetic energy of the objectWhen the mass increases, the kinetic energy will increase.
[tex]v^2 = \frac{2K.E }{m}\\\\v=\sqrt{\frac{2K.E }{m}}[/tex]
when the mass increases, the velocity of the cannonball will decrease.
Thus, we can conclude that if the mass of the cannonball increases, and all other initial conditions stay the same, the velocity decreases, and the kinetic energy increases.
Learn more here:https://brainly.com/question/6498875
if you can answer all of these questions, you are a genius.
1. What is matter made of?
2. Define matter.
3. Give 3 examples of things that are made of matter.
4. What is the difference between solid, liquid, and gas?
5. What is a chemical reaction?
6. Explain the difference between the reactants and products.
7. Do you have any plans for Halloween and the break?
Answer:
1.matter made of mass and volume
2.matter is any substance that has mass and takes up a space by having a volume
3.table, coffee, and perfume
4.solid has a strong bonds, liquid has weak bond, and gas no bond
5
Astronauts working on the International Space Station (ISS) experience
weightlessness as they travel the earth's orbit. Which statement correctly describes
the forces acting on an astronaut on the ISS?
Answer:
This question is incomplete
Explanation:
This question is incomplete because of the absence of options. However, Astronauts working in space do not have any external force acting upward or downward on them; meaning there is no contact force pushing or pulling there body and thus experience/feel weightlessness. This causes them to be in a state of constant free fall when they are orbiting the earth. This free fall is similar to what is experienced in elevators and roller coasters in amusement parks.
A 0.050 kg toy truck moving right at 0.20 m/s collided with a toy car weighing 0.015 kg initially at rest, on a frictionless track. The truck keeps moving right at 0.15 m/s after the collision,
what is the final speed of the race car?
Answer:
0.1667 m/s
Explanation:
m1V1 + m2V2 = m1V3 + m2V4
0.01 = ( 0.0075) + (0.015 * V4)
V4 = (0.01 - 0.0075) / (0.015)
V4= 0.1667
Answer:
0.167 m/s
Explanation:
Why is the car industry a good example of energy efficiency and human technology over time?
Answer:
Fortunately, the potential for higher energy efficiency is great. ... For example, landlords of rental residential buildings are not motivated to pay for ... it over time, and the timeframes in which specific technologies can be expected to ... especially for small firms, and many industries prefer to expend their human and financial.
4 Energy Efficiency | America's Energy Future: Technology. this is a site
Explanation:
Answer:
the car industry is one of the most important industry in the world as it aid easy transportation of goods and man.
Explanation:
cars and other automobiles have aid easy movement of people and goods from one place to another as it is more efficient (does not waste time as compared to traditional means of transportation.)and reliable.
Juana is creating a lab simulation about the movement of the particles in a nonmetal gas. The user can change the pressure in the gas' temperature and see the effect of the change in the gas' volume. What changes should Juana program to cause the decrease in the gas' volume?
Answer:
Increase gas pressure and decrease gas temperature
Explanation:
To Create a lab simulation whereby the changes in pressure exerted on the gas will affect the volume of the gas volume negatively ( decrease in gas volume ) the changes that Juana should program is to increase the pressure on the gas molecules because increase in gas pressure = decrease in gas volume while increase in temperature will lead to increase in gas
Hence in order to effectively achieve the decrease in gas volume with the lab simulation; she should increase gas pressure and decrease gas temperature
Answer:
pressure then volume
Explanation:
edge chemistry 2021
A net force of 124.0 N is applied to a certain object. As a result, the object's acceleration is 71.0 m/s/s. What is the mass of the object?
Answer:
[tex] \huge{ \boxed{ \sf{1.74 \: kg}}}[/tex]
☯ Question :
A net force of 124.0 N is applied to a certain object. As a result , the object's acceleration is 71.0 m/s/s ( m/s ² ). What is the mass of the object ?☯ [tex] \underbrace{ \sf{Required \: Answer: }}[/tex]
☥ Given :
Net force = 124.0 NAcceleration = 71.0 m/s☥ To find :
Mass of an object✎ We know :
[tex] \boxed{ \sf{net \: force = mass \: \times \: acceleration}}[/tex]
Substitute all the values and solve for m
➛ [tex] \sf{124.0 = mass \times 71.0}[/tex]
➛ [tex] \sf{71.0 \: mass = 124.0}[/tex]
➛ [tex] \sf{ \frac{71.0 \: mass}{71.0} = \frac{124.0}{71.0}} [/tex]
➛ [tex] \sf{mass = 1.74 \: kg}[/tex]
Hope I helped!
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A car sets off from traffic lights. It reaches a speed
of 27 m/s in 18 s. What is its acceleration?
1. to
Answer:
1.5 m/s^2
Explanation:
a = velocity/time
27/18 = 1.5 m/s^2
Which fluid is more dense, water or air?
(Yes, I know that air isn't a fluid, but it's the actual question made by my teacher lol)
Answer:
water
Explanation:
water is 1000 kg/m3 while air is 1.225 kg/m3
A block slides down a 30.0 degree inclined plane at an acceleration of 2.0 m/s^2. What is the coefficient of friction between the block and the inclined plane? Use g=10.0 m/s^2
A) .20
B) .25
C) .30
D) .35
Answer:
D) .35
Explanation:
m = Mass of block
g = Acceleration due to gravity = [tex]10\ \text{m/s}^2[/tex]
[tex]\theta[/tex] = Angle of inclination = [tex]30^{\circ}[/tex]
a = Acceleration of block = [tex]2\ \text{m/s}^2[/tex]
[tex]\mu[/tex] = Coefficient of friction between the block and the inclined plane
f = Frictional force = [tex]\mu mg\cos\theta[/tex]
As the forces are conserved in the system we have
[tex]mg\sin\theta-f=ma\\\Rightarrow mg\sin\theta-\mu mg\cos\theta=ma\\\Rightarrow g(\sin\theta-\mu\cos\theta)=a\\\Rightarrow \sin30^{\circ}-\mu\cos30^{\circ}=\dfrac{2}{10}\\\Rightarrow \dfrac{1}{2}-\mu\dfrac{\sqrt{3}}{2}=0.2\\\Rightarrow \mu=\dfrac{\dfrac{1}{2}-0.2}{\dfrac{\sqrt{3}}{2}}\\\Rightarrow \mu=\dfrac{0.3\times 2}{\sqrt{3}}\\\Rightarrow \mu=0.3464\approx 0.35[/tex]
The coefficient of friction between the block and the inclined plane is 0.35
Amy is driving her 2400 kg car down the road, and the car produces a force of 7200 N. How fast is Amy accelerating?
Answer:
The acceleration of Amy's car is 3 m/s²
Explanation:
Given;
mass of Amy's car, m = 2400 kg
force of the car, F = 7200 N
According to Newton's second law of motion, the force of the car is given as;
F = ma
where;
a is the acceleration of the car
Substitute the given parameters and solve for acceleration;
a = F / m
a = (7200) / (2400)
a = 3 m/s²
Therefore, the acceleration of Amy's car is 3 m/s²
A 244.0 N block is at rest on a flat, frictionless table. A hooked cable applies an upward force of 24.0 N on the block. What is the normal force acting on the block?
Answer:
268N
Explanation:
The upward force acting on the block are the reaction and the hooked table..
The total normal force acting = normal reaction + 24N
Note that the normal reaction is always equal the weight of the table
Hence the normal force acting in the block is 244.0+24 = 268.0N
Which item is needed for clouds to develop?
Snow
Grass
Rain
Dust in the Air
(will mark brainliest)
Answer:
snow or rain
Explanation:
i know it has to be some kind of water , but I just don't know which one sadly . hope this helped :) !
Answer:
dust . i did this
Explanation:
How does mass affect acceleration during free fall?
Pick a hypothesis below now.
If an object falls freely, then heavy objects accelerate more than light objects.
If an object falls freely, then heavy objects accelerate less than light objects.
If an object falls freely, then heavy objects accelerate nearly the same as light objects.
Answer:
it is the 3rd one
Explanation:
If an object falls freely, then heavy objects accelerate nearly the same as light objects.
What results when energy is transformed while juggling three bowling pins?
Answer:
his is an example of the transformation of gravitational potential energy into kinetic energy
Explanation:
The game of juggling bowling is a clear example of the conservation of mechanical energy,
when the bolus is in the upper part of the path mechanical energy is potential energy; As this energy descends, it becomes kinetic energy where the lowest part of the trajectory, just before touching the hand, is totally kinetic.
At the moment of touching the hand, a relationship is applied that reverses the value of the speed, that is, now it is ascending and the cycle repeats.
Therefore this is an example of the transformation of gravitational potential energy into kinetic energy
Juan makes an adjustment to an electromagnet that causes the electromagnet to lose some of its strength. What did Juan most likely do?
He reduced the number of loops in the wire.
He increased the number of loops in the wire.
He reduced the length of the wire.
He increased the length of the wire.
Answer:
Its A
Explanation:
To reduce the strength of an electromagnet, Juan must reduced the number of loops in the wire.
What is electromagnetic field strength?
The strength of an electromagnetic is the effect or force that an electromagnet exerts in a given field.
The strength of an induced emf in a given magnetic field is given by;
emf = NBA/t
where;
N is number of turns of the magnetB is magnetic field strengthA is area of the coilDecrease in number of turns of the wire, reduces the strength of the magnetic field.
Thus, to reduce the strength of an electromagnet, Juan must reduced the number of loops in the wire.
Learn more about electromagnet here: https://brainly.com/question/12555869
#SPJ2
When a substance is heated it can..... (Select all that apply)
a) Change from solid to liquid
b) get warmer
c) get colder
d) change from a gas to liquid
compare and contrast linear relationship and nonlinear relationship
Explanation:
The graph of a linear equation forms a straight line, whereas the graph for a non-linear relationship is curved. ... A non-linear relationship reflects that each unit change in the x variable will not always bring about the same change in the y variable
4. A small rocket with a mass of 2000 g (hint: grams) accelerates at 8.3 m/s/s as it launches into the sky. How much force is acting on the rocket?
Answer:
16.6N
Explanation:
Given parameters:
Mass of rocket = 2000g = 2kg
Acceleration = 8.3m/s²
Unknown:
Force acting on the rocket = ?
Solution:
The force acting on a body can be derived from the product of its mass and acceleration;
Force = mass x acceleration
Insert the parameters and solve;
Force = 2 x 8.3 = 16.6N
Analyze the chemical reaction below
16 g CH4 + 64 g O2 → 44 g CO2 + 36g H2O
Explain the law of conservation of mass and describe how the equation represents the law of conservation of mass.
Answer:
Explanation:
The law of conservation of mass states that the mass of the elements at the beginning of the reaction(reactants) will equal the mass at the end of the reaction (product) .
In the chemical equation above,the total mass of the reactants is 80g(16+64) and the total mass of the products is also 80g(44+36).therefore the mass remained constant and that's how the equation represents the law of conservation of mass
A hole is punched at A in a plastic sheet by applying a 660-N force P to end D of lever CD, which is rigidly attached to the solid cylindrical shaft BC. Design specifications require that the displacement of D should not exceed 15 mm from the time the punch first touches the plastic sheet to the time it actually penetrates it. Determine the required diameter of shaft BC if the shaft is made of a steel with G.
Answer:
hello your question lacks some data and required diagram
G = 77 GPa, т all = 80 MPa
answer : required diameter = 252.65 * 10-^3 m
Explanation:
Given data :
force ( P ) = 660 -N force
displacement = 15 mm
G = 77 GPa
т all = 80 MPa
i) Determine the required diameter of shaft BC
considering the vertical displacement ( looking at handle DC from free body diagram )
D' = 0.3 sin∅ , where D = 0.015
hence ∅ = 2.8659°
calculate the torque acting at angle ∅ of CD on the shaft BC
Torque = 660 * 0.3 cos∅
= 660 * 0.3 * cos 2.8659 = 198 * -0.9622 = 190.5156 N
hello attached is the remaining part of the solution
The required diameter of shaft BC will be 252.65 ×10⁻³A shaft's diameter is the line that goes through its center and splits it into two equal halves.
What is the diameter?A diameter is a line that travels through the center of a sphere and intersects the circumference at opposing ends. It measures twice as long as the sphere's radius
The given data in the problem is;
P is the force = 660 N
d is the displacement = 15 mm
G is the constant= 77 GPa
τ is the shear stress= 80 MPa
From the torsional equation;
[tex]\frac{\tau}{R} =\frac{T}{j} \\\\ \frac{\pi}{32} \times d^4=\\\\ \tau =\frac{T \times R}{J} \\\\\ \tau =\frac{T \times (\frac{d}{2} )}{J} \\\\ 80= \frac{32 \times 190 \times \frac{d}{2} }{\pi} \\\\\\d=252.65 \times 10^{-3}[/tex]
Hence the required diameter of shaft BC will be 252.65 ×10⁻³.
To learn more about the diameter refer to the link;
https://brainly.com/question/5501950
Calculate the kinetic energy of a 1 kg object moving at 4.5 ms. Round to the first decimal.
Answer:
91.21
Explanation:
Kinetic energy =1/2 mv2 substitute the values I. E 1/2 *1 *4.5^2= 91.21
If a 40 kg pumpkin is thrown through your neighbors window with an acceleration rate of 2 m/s, what’s the force you through it with?
Answer:
[tex]\boxed {\boxed {\sf 80 \ Newtons}}[/tex]
Explanation:
Force can be found by multiplying the mass by the acceleration.
[tex]F=m*a[/tex]
The mass of the pumpkin is 40 kilograms.
The acceleration of the pumpkin is 2 meters per second squared.
[tex]m= 40 \ kg \\a= 2 \ m/s^2[/tex]
Substitute the values into the formula.
[tex]F= 40 \ kg *2 \ m/s^2[/tex]
Multiply.
[tex]F= 80 \ kg*m/s^2[/tex]
A kilogram meter per second squared is equal to 1 Newton. Therefore, our answer of 80 kg*m/s² is also equal to 80 Newtons (N).
[tex]F=80 \ N[/tex]
The force is 80 Newtons.
Answer:
80 newton
Explanation:
F=ma so we now substitute our values I. E 40kg*2m/s=80 Newton
A student is helping his teacher move a 40.0 kg aquarium. What net sideways force must he exert on the aquarium to slide it across the floor so that it accelerates at 0.50 m/s2?
Answer:
20 N
Explanation:
From the question given above, the following data were obtained:
Mass (m) of aquarium = 40 kg
Acceleration (a) = 0.50 m/s²
Force (F) =?
Force is simply defined as the product of mass and acceleration. Mathematically, it is expressed as:
Force (F) = mass (m) × acceleration (a)
F = m × a
With the above, we can obtain the force needed to slide the aquarium as follow:
Mass (m) of aquarium = 40 kg
Acceleration (a) = 0.50 m/s²
Force (F) =?
F = m × a
F = 40 × 0.5
F = 20 N
Therefore, a force of 20 N is needed to slide the aquarium.
Mr. Palmer's dog is running at you at a a speed of 3.8 m/s. She has a KE of 231.04 J. How massive is Mr. Palmer's dog?
answer
Answer:
32kg
Explanation:
Given parameters:
Speed of the dog = 3.8m/s
Kinetic energy = 231.04J
Unknown:
Mass of Mr.Plamer's dog = ?
Solution:
Kinetic energy is the energy due to the motion of a body;
Mathematically, it is represented as;
K.E = [tex]\frac{1}{2}[/tex] m v²
m is the mass
v is the velocity
Insert the parameters and solve;
231.04 = [tex]\frac{1}{2}[/tex] x m x 3.8²
231.04 x 2 = 2 x [tex]\frac{1}{2}[/tex] x m x 3.8²
462.08 = 14.44m
m = 32kg
what type of service does time safari, inc. provide?
Answer:
Explanation:
“The Sound of Thunder” is set in the year 2055. Time Safari, Inc. offers time-travel opportunities to hunt and kill exotic and now-extinct animals. In the hunt described in the story, the team of two guides and three hunters goes back to prehistoric days in order to kill the largest dinosaur of them all, a Tyrannosaurus rex. The business has already put safety precautions into place so that these trips can be made without unduly impacting the future. The animals that are killed are ones that have already been identified as doomed. For example, the T rex in question was going to be killed by a falling tree anyway. The safari leaders also built a path for visitors to step on so that no element of the past setting is tampered with. Even the slightest misstep could have implications for the future.