Question 1

A spacecraft can gain energy by passing near a planet.

Accepted Answer

A) True 
 B)False

Question 2

Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up.
-Kinetic energy

Accepted Answer

A) is definitely conserved. 
B) is definitely not conserved. 
C) may or may not be conserved. 
D) none of the above 
A) is definitely conserved. 
B) is definitely not conserved. 
C) may or may not be conserved. 
D) none of the above

Question 3

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.
-The kinetic energy of the crate is 1/2 mv2.

Accepted Answer

A) True 
 B)False

Question 4

A kid slides down an icy (frictionless) hill starting from rest. At the top his gravitational potential energy is 500 J.
-Suppose after reaching the bottom he then continues sliding up another icy slope on the other side of the valley.When he finally comes to a stop he will have reached a height

Accepted Answer

A) equal to the height he started from on the other hill. 
B) less than the height he started from on the other hill. 
C) more than the height he started from on the other hill. 
D) none of the above 
A) equal to the height he started from on the other hill. 
B) less than the height he started from on the other hill. 
C) more than the height he started from on the other hill. 
D) none of the above

Question 5

You carry a 20-N box 5 m horizontally across a room.The work you do is 100 N-m.

Accepted Answer

A) True 
 B)False

Question 6

A watt is equal to 746 horsepower.

Accepted Answer

A) True 
 B)False

Question 7

A 50-kg ice skater moving at 6 m/s collides with a second stationary skater with mass 70 kg.The skaters cling together after the collision and move without friction.Compute their speed after the collision.

Accepted Answer

The answer of A 50-kg ice skater moving at 6...

Question 8

When a car comes to a stop its kinetic energy is converted to internal energy in its brakes,heating them up.

Accepted Answer

A) True 
 B)False

Question 9

In a closed system,the kinetic energy plus the potential energy is a constant.

Accepted Answer

A) True 
 B)False

Question 10

To be able to do work,a system must have _______.

Accepted Answer

The answer of To be able to do work,a system...

Question 11

An object moving in a circle at a steady speed has

Accepted Answer

A) constant linear momentum. 
B) constant angular momentum. 
C) constant velocity. 
D) constant acceleration. 
A) constant linear momentum. 
B) constant angular momentum. 
C) constant velocity. 
D) constant acceleration.

Question 12

​Match each item with the correct statement below.​
-the measure of a system's capacity to do work

Accepted Answer

A) ​angular momentum 
B) ​elastic collision 
C) ​elastic potential energy 
D) ​energy 
E) ​gravitational potential energy
F)​heat
G)​inelastic collision
H)​kinetic energy
I)​lever
J)​linear momentum
K)​power
L)​work
M)​internal energy 
A) ​angular momentum 
B) ​elastic collision 
C) ​elastic potential energy 
D) ​energy 
E) ​gravitational potential energy
F)​heat
G)​inelastic collision
H)​kinetic energy
I)​lever
J)​linear momentum
K)​power
L)​work
M)​internal energy

Question 13

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.
-The quantity 1/2 mv2 is

Accepted Answer

A) the kinetic energy of the crate. 
B) the potential energy of the crate. 
C) the linear momentum of the crate. 
D) the work you do on the crate. 
E) the power you supply to the crate. 
A) the kinetic energy of the crate. 
B) the potential energy of the crate. 
C) the linear momentum of the crate. 
D) the work you do on the crate. 
E) the power you supply to the crate.

Question 14

Centripetal force changes linear momentum but not angular momentum.

Accepted Answer

A) True 
 B)False

Question 15

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.
-The work you do on the crate is Fv.

Accepted Answer

A) True 
 B)False

Question 16

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.
-The quantity Fd is

Accepted Answer

A) the kinetic energy of the crate. 
B) the potential energy of the crate. 
C) the linear momentum of the crate. 
D) the work you do on the crate. 
E) the power you supply to the crate. 
A) the kinetic energy of the crate. 
B) the potential energy of the crate. 
C) the linear momentum of the crate. 
D) the work you do on the crate. 
E) the power you supply to the crate.

Question 17

The energy of a body moving across a horizontal surface is an example of kinetic energy.

Accepted Answer

A) True 
 B)False

Question 18

Consider a situation where a constant force of 25 N acts on an object having a mass of 2 kg for 3 seconds.
-What is the magnitude of the change in the object's momentum?

Accepted Answer

A) 150 kg m/s 
B) 50 kg m/s 
C) 75 kg m/s 
D) undetermined-not enough information given 
E) none of the above 
A) 150 kg m/s 
B) 50 kg m/s 
C) 75 kg m/s 
D) undetermined-not enough information given 
E) none of the above

Question 19

What is the kinetic energy of a 5,000-kg truck traveling at 25 m/s?

Accepted Answer

The answer of What is the kinetic energy of a...

Question 20

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.
-After the dropped box hits the floor,its kinetic energy is converted into ____________.

Accepted Answer

The answer of Consider a situation where you carry a...

A spacecraft can gain energy by passing near a planet.

Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up. -Kinetic energy

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. -The kinetic energy of the crate is 1/2 mv².

A kid slides down an icy (frictionless) hill starting from rest. At the top his gravitational potential energy is 500 J. -Suppose after reaching the bottom he then continues sliding up another icy slope on the other side of the valley.When he finally comes to a stop he will have reached a height

You carry a 20-N box 5 m horizontally across a room.The work you do is 100 N-m.

A watt is equal to 746 horsepower.

A 50-kg ice skater moving at 6 m/s collides with a second stationary skater with mass 70 kg.The skaters cling together after the collision and move without friction.Compute their speed after the collision.

When a car comes to a stop its kinetic energy is converted to internal energy in its brakes,heating them up.

In a closed system,the kinetic energy plus the potential energy is a constant.

To be able to do work,a system must have _______.

An object moving in a circle at a steady speed has

Match each item with the correct statement below. -the measure of a system's capacity to do work

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. -The quantity 1/2 mv² is

Centripetal force changes linear momentum but not angular momentum.

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. -The work you do on the crate is Fv.

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. -The quantity Fd is

The energy of a body moving across a horizontal surface is an example of kinetic energy.

Consider a situation where a constant force of 25 N acts on an object having a mass of 2 kg for 3 seconds. -What is the magnitude of the change in the object's momentum?

What is the kinetic energy of a 5,000-kg truck traveling at 25 m/s?

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. -After the dropped box hits the floor,its kinetic energy is converted into ____________.

The Study of Motion

Newtons Laws

Physics of Matter

Temperature and Heat

Waves and Sound

Electricity

Electromagnetism and Em Waves

Optics

Atomic Physics

Nuclear Physics

Special Relativity and Elementary Particles

Filters

Exam 3: Energy and Conservation Laws

A spacecraft can gain energy by passing near a planet.

Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up. -Kinetic energy

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. -The kinetic energy of the crate is 1/2 mv2.

A kid slides down an icy (frictionless) hill starting from rest. At the top his gravitational potential energy is 500 J. -Suppose after reaching the bottom he then continues sliding up another icy slope on the other side of the valley.When he finally comes to a stop he will have reached a height

You carry a 20-N box 5 m horizontally across a room.The work you do is 100 N-m.

A watt is equal to 746 horsepower.

A 50-kg ice skater moving at 6 m/s collides with a second stationary skater with mass 70 kg.The skaters cling together after the collision and move without friction.Compute their speed after the collision.

When a car comes to a stop its kinetic energy is converted to internal energy in its brakes,heating them up.

In a closed system,the kinetic energy plus the potential energy is a constant.

To be able to do work,a system must have _______.

An object moving in a circle at a steady speed has

​Match each item with the correct statement below.​ -the measure of a system's capacity to do work

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. -The quantity 1/2 mv2 is

Centripetal force changes linear momentum but not angular momentum.

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. -The work you do on the crate is Fv.

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. -The quantity Fd is

The energy of a body moving across a horizontal surface is an example of kinetic energy.

Consider a situation where a constant force of 25 N acts on an object having a mass of 2 kg for 3 seconds. -What is the magnitude of the change in the object's momentum?

What is the kinetic energy of a 5,000-kg truck traveling at 25 m/s?

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. -After the dropped box hits the floor,its kinetic energy is converted into ____________.

The Study of Motion

Newtons Laws

Physics of Matter

Temperature and Heat

Waves and Sound

Electricity

Electromagnetism and Em Waves

Optics

Atomic Physics

Nuclear Physics

Special Relativity and Elementary Particles

Filters

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. -The kinetic energy of the crate is 1/2 mv².

Match each item with the correct statement below. -the measure of a system's capacity to do work

Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. -The quantity 1/2 mv² is