IMPULSE AND MOMENTUM

Question 1

is a measure of the product of an object’s mass and its velocity.

Answer 1

momentum

Question 2

is a concept in physics that describes the change in momentum of an object when a force is applied over a period of time.

Answer 2

Impulse

Question 3

Impulse is usually associated with ______ where transfer of momentum happens.

Answer 3

collisions

Question 4

A 0.15 kg baseball is thrown toward a batter at a velocity of 40 m/s. The batter hits the ball, sending it back in the opposite direction with a velocity of 60 m/s. The bat was in contact with the ball for 0.005 seconds.

What is the impulse delivered and force applied to the ball?

Answer 4

J = −𝟏𝟓𝒌𝒈∙𝒎/𝒔
F = -3000N

Question 5

In idealized system, momentum is conserved.

Answer 5

CONSERVATION OF MOMENTUM

Question 6

isa collision in which there is no net loss in kinetic energy in the system as a result of the collision.

Answer 6

ELASTIC COLLISION

Question 7

Happens only in idealized situations.

Answer 7

PERFECTLY ELASTIC COLLISION

Question 8

takes place between two objects in which some energy is lost.

Answer 8

INELASTIC COLLISION

Question 9

Momentum is conserved while KE is not.

Answer 9

INELASTIC COLLISION

Question 10

Objects lose some kinetic energy but move separately after the collision.

Answer 10

Partially Inelastic Collision

Question 11

Objects lose maximum kinetic energy and stick together, moving as one mass.

Answer 11

Perfectly Inelastic Collision

Question 12

What is the momentum of a person running on treadmill relative to the ground?

Answer 12

p = 0 kg m/s

Question 13

Calculate the impulse exerted by 10N of force for 0.1s to a rolling ball.

Answer 13

J = 1Ns

Question 14

What type of collision is demonstrated when two billiard balls collide?

Answer 14

Elastic Collision

Question 15

What is conserved in inelastic collisions?

Answer 15

Momentum only

Question 16

states that in any closed system, the total momentum will remain constant after collision.

Answer 16

CONSERVATION OF MOMENTUM

Question 17

A marble with a mass of 0.04 kg is moving at a speed of 2 m/s when it hits a second marble of the same mass that is initially at rest. After the collision, the first marble bounces back with a speed of 2 m/s in the opposite direction. What is the speed of the second marble after the collision?

Answer 17

4 m/s

Question 18

ELASTIC COLLISION PROBLEMS
A carriage of mass 0.150 kg moving with a velocity of 1.2 m/s collides with a 0.30 kg carriage that is stationary on an air track. The second carriage moves at 0.8 m/s after the collision. Calculate the velocity after the collision of the first carriage if the collision is perfectly elastic.

Answer 18

𝒗_𝟏^′=−𝟎.𝟒 𝒎/𝒔

Question 19

ELASTIC COLLISION PROBLEMS
A 3 kg steel ball moving at 8 m/s collides with a stationary steel ball of mass 2 kg. After the collision, both balls move in the same direction. The velocity of the 3 kg ball is 4 m/s after the collision. What is the velocity of the 2 kg ball after the collision?

Answer 19

𝒗_𝟐^′=𝟔 𝒎/𝒔

Question 20

INELASTIC COLLISION PROBLEMS
A toy freight train car of mass 50 kg collides with a stationary empty car of mass 15 kg while moving 5 m/s. At the collision the cars couple together. What is the final velocity of the moving pair?

Answer 20

𝒗𝒇 =𝟑.𝟖𝟓 𝒎/𝒔

Question 21

INELASTIC COLLISION PROBLEMS
A 20 g bullet moving horizontally at 50 m/s strikes a 7 kg block resting on a table. The bullet embeds in the block after collision. Find the speed of the block after collision.

Answer 21

𝒗𝒇 =𝟎.𝟏𝟒𝟐 𝒎/𝒔