Impulse/Momentum Test Review

What are the units for mass? 

• kg
• N
• s
• m

What are the units for force? 

• kg
• N
• s
• m

Tags

NGSS.HS-PS2-1

What are the units for time? 

• kg
• N
• s
• m

What are the units for momentum? 

• kg s
• kg m/s
• kg m
• N kg

Tags

NGSS.HS-PS2-2

What are the units for impulse? 

• N s
• N m/s
• N m
• N kg

Two football players, one ½ as heavy as the other, run across a field at the same speed. Compared to the heavier football player, the momentum of the lighter football player  is _____.

• Three times as much
• Two times as much
• The same
• Half as much

Tags

NGSS.HS-PS2-2

What happens to an object’s Impulse if I decrease the amount of time by ½?

• The impulse goes to zero.
• The impulse halves.
• The impulse doubles.
• Nothing. Impulse stays the same.

A 2kg car moving at 7 m/s bumps into a 4 kg car at rest. After the elastic collision, the 2 kg car comes to a stop. How fast does the 4kg car move away?

• It stops
• 2.33 m/s
• 3.5 m/s
• Not enough info

A 2kg car moving at 7 m/s bumps into a 4 kg car at rest. After the elastic collision, the 2 kg car comes to a stop. What is the total momentum of the system before the collision?

• 0 kg m/s
• 6 kg m/s
• 14 kg m/s
• Not enough info

A 2kg car moving at 7 m/s bumps into a 4 kg car at rest. After the elastic collision, the 2 kg car comes to a stop. What is the total momentum of the system after the collision?

• 0 kg m/s
• 6 kg m/s
• 14 kg m/s
• Not enough info