Momentum1

How many of these graphs show an object slowing down?

• 0

• 1

• 2

• 3

• 4

How many of these graphs show an object moving in the positive direction?

• 0

• 1

• 2

• 3

• 4

Answer explanation

Which d-t graphs have a positive trend, and which v-t graphs are above the x-axis?

How many of these graphs show an object moving in the negative direction?

• 0

• 1

• 2

• 3

• 4

Which two graphs show the same motion?

• D and E

• C and F

• A and F

• A and B

• A and D

Is it possible for a huge object to have a very small amount of momentum?

• No, momentum depends on mass.

• Yes, but only if it is moving backwards.

• Yes, it would just need a very small velocity.

A LARGE object collides INELASTICALLY with a SMALL object. (both were moving)

Which object experiences a greater FORCE during the collision?

• The large one

• The small one

• They are the same

• It depends on their initial speeds

A LARGE object collides INELASTICALLY with a SMALL object. (both were moving)

Which object experiences a greater CHANGE IN MOMENTUM during the collision?

• The large one

• The small one

• They are the same

• It depends on their initial speeds

Answer explanation

One gained the EXACT amount that the other lost! (think back to the popsicle stick analogy...)

A LARGE object collides INELASTICALLY with a SMALL object. (both were moving)

Which object experiences a greater CHANGE IN SPEED during the collision?

• The large one

• The small one

• They are the same

• It depends on their initial speeds

A LARGE object collides INELASTICALLY with a SMALL object. (both were moving)

Which object experiences a greater ACCELERATION during the collision?

• The large one

• The small one

• They are the same

• It depends on their initial speeds

A 2kg BLUE cart collides inelastically with a 1kg red cart. The blue cart loses 4 m/s. The red cart will:

• Gain 4 m/s

• Lose 8 m/s

• Gain 8 m/s

• Gain 2 m/s