Momentum

The impulse is ______ the change in momentum

• greater than
• equal to
• less than
• always double

The momentum of an object depends upon the object's ___________&_____________.  

• size and shape
• mass and speed
• mass and velocity
• mass and energy

Determine the momentum of 1000-kg car moving northward at 20 m/s.

• 20000 N

• 20000 Joules

• 20000 kgms^-1

• 20000 kgms^-1 north

When the speed of an object is doubled, its momentum __________.

• remains unchanged 
• doubles
• quadruples
• decreases

The equation to calculate momentum is __________.

• p=mv
• p=1/2mv²
• p=mgh
• p=mg

Which object listed below has the greatest momentum?

• A 0.05 kg object rolling at 0.2 m/s.
• A 0.15 kg object rolling at 2 m/s.
• A 0.15 kg object rolling at 1 m/s
• A 0.4 kg object rolling at 2 m/s.

The conservation of momentum means...

• The momentum before an event disappears after the event

• The momentum before and after the collisions are equal

• The momentum before an event increases after the event

• The momentum before and after an event changes

The units for Impulse are

• N/s
• N.s
• N
• m/s

A runner has a momentum of 670 kg m/s and is travelling at a velocity of 9 m/s. What is his mass?

• 6030 kg
• 0.0134 kg
• 74.4 kg
• 80 kg

Cart A is pulled with a 2 Newton force for 2 seconds, and Cart B is pulled with a 1 Newton force for 3 seconds.  Which cart experiences the greatest impulse?

• Cart B
• Cart A
• they are the same