Question 1

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.
-You drop the box.As it falls to its original level,its kinetic energy is __________.

Accepted Answer

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

Question 2

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...

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 work you do on the crate is __________.

Accepted Answer

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

Question 4

Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up.
-Angular momentum __________ conserved.

Accepted Answer

The answer of Consider a situation where a skater pulls...

Question 5

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 potential energy of the crate is __________.

Accepted Answer

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

Question 6

A 2-kg car moving towards the right at 4 m/s collides head on with an 8 kg car moving towards the left at 2 m/s,and they stick together.After the collision,the velocity of the combined bodies is __________ m/s pointing __________.

Accepted Answer

The answer of A 2-kg car moving towards the right...

Question 7

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 __________.

Accepted Answer

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

Question 8

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.
-The work you do is __________.

Accepted Answer

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

Question 9

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

Accepted Answer

The answer of You carry a 20-N box 5 m...

Question 10

A light aircraft that weighs 1,600 N is accelerated at 8 m/s/s for 15 seconds.The work done on the aircraft is _________.

Accepted Answer

The answer of A light aircraft that weighs 1,600 N...

Question 11

In a collision that is inelastic,the total _________ after the collision is not the same as before the collision.

Accepted Answer

The answer of In a collision that is inelastic,the total...

Question 12

A hunter notches a 0.05-kg arrow in a compound bow and draws the arrow back to set the bow.The hunter does 50 J of work in the process setting the bow/arrow combination and then releases the arrow.The speed of the arrow is ___________.

Accepted Answer

The answer of A hunter notches a 0.05-kg arrow in...

Question 13

Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up.
-Linear momentum __________ conserved.

Accepted Answer

The answer of Consider a situation where a skater pulls...

Question 14

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.
-After you drop the box and it has fallen half way,its potential energy is __________ and its kinetic energy is __________.

Accepted Answer

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

Question 15

A person runs up a long flight of stairs in 10 seconds.If the person's weight is 600 N and the vertical height of the stairs is 20 meters,the person's power output is __________.

Accepted Answer

The answer of A person runs up a long flight...

Question 16

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.
-The increase of potential energy of the box is __________.

Accepted Answer

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

Question 17

A worker on top of a radar tower 80 m high drops a wrench off the tower.The speed of the wrench when it hits the ground is ____________

Accepted Answer

The answer of A worker on top of a radar...

Question 18

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 linear momentum of the crate is __________.

Accepted Answer

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

Question 19

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 power you supply to the crate is __________.

Accepted Answer

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

Question 20

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

Accepted Answer

The answer of Consider a situation where a skater pulls...

Quiz 3: Energy and Conservation Laws

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. -You drop the box.As it falls to its original level,its kinetic energy is __________.

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 ____________.

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 __________.

Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up. -Angular momentum __________ conserved.

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 potential energy of the crate is __________.

A 2-kg car moving towards the right at 4 m/s collides head on with an 8 kg car moving towards the left at 2 m/s,and they stick together.After the collision,the velocity of the combined bodies is m/s pointing .

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 __________.

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. -The work you do is __________.

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

A light aircraft that weighs 1,600 N is accelerated at 8 m/s/s for 15 seconds.The work done on the aircraft is _________.

In a collision that is inelastic,the total _________ after the collision is not the same as before the collision.

A hunter notches a 0.05-kg arrow in a compound bow and draws the arrow back to set the bow.The hunter does 50 J of work in the process setting the bow/arrow combination and then releases the arrow.The speed of the arrow is ___________.

Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up. -Linear momentum __________ conserved.

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. -After you drop the box and it has fallen half way,its potential energy is and its kinetic energy is .

A person runs up a long flight of stairs in 10 seconds.If the person's weight is 600 N and the vertical height of the stairs is 20 meters,the person's power output is __________.

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. -The increase of potential energy of the box is __________.

A worker on top of a radar tower 80 m high drops a wrench off the tower.The speed of the wrench when it hits the ground is ____________

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 linear momentum of the crate is __________.

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 power you supply to the crate is __________.

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

Quiz 3: Energy and Conservation Laws

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. -You drop the box.As it falls to its original level,its kinetic energy is __________.

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 ____________.

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 __________.

Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up. -Angular momentum __________ conserved.

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 potential energy of the crate is __________.

A 2-kg car moving towards the right at 4 m/s collides head on with an 8 kg car moving towards the left at 2 m/s,and they stick together.After the collision,the velocity of the combined bodies is __________ m/s pointing __________.

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 __________.

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. -The work you do is __________.

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

A light aircraft that weighs 1,600 N is accelerated at 8 m/s/s for 15 seconds.The work done on the aircraft is _________.

In a collision that is inelastic,the total _________ after the collision is not the same as before the collision.

A hunter notches a 0.05-kg arrow in a compound bow and draws the arrow back to set the bow.The hunter does 50 J of work in the process setting the bow/arrow combination and then releases the arrow.The speed of the arrow is ___________.

Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up. -Linear momentum __________ conserved.

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. -After you drop the box and it has fallen half way,its potential energy is __________ and its kinetic energy is __________.

A person runs up a long flight of stairs in 10 seconds.If the person's weight is 600 N and the vertical height of the stairs is 20 meters,the person's power output is __________.

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. -The increase of potential energy of the box is __________.

A worker on top of a radar tower 80 m high drops a wrench off the tower.The speed of the wrench when it hits the ground is ____________

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 linear momentum of the crate is __________.

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 power you supply to the crate is __________.

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

A 2-kg car moving towards the right at 4 m/s collides head on with an 8 kg car moving towards the left at 2 m/s,and they stick together.After the collision,the velocity of the combined bodies is m/s pointing .

Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m. -After you drop the box and it has fallen half way,its potential energy is and its kinetic energy is .