Momentum and Impulse

The Impulse - Momentum Theorem

​

Multiple Choice

The equation to calculate momentum is

• p=mv
• p=1/2mv²
• p=mgh
• p=mg

Multiple Choice

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

• size and shape
• mass and speed
• mass and veloctiy
• mass and energy

Multiple Choice

Remember p = mv.

Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?

• car

• bike

• they are equal

• cannot determine using the info provided

Multiple Choice

Remember p = mv. Determine the momentum of 1000-kg car moving southward at 20 m/s.........

• -20000 N

• -20000 J

• -20000 kg *m/s

• -10000 kg * m/s

Multiple Choice

The impulse is ______ the change in momentum

• Greater than

• Equal to

• less than

• always double

Multiple Choice

Remember impulse = F T.

A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s.

Calculate the impulse on the ball.

• 1 N*s

• 6 N*s

• 33.3 N*s

• None of these

The answer to all of them is that by increasing time, you decrease force.

Multiple Choice

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

• 20000 N

• -20000 Joules

• -20000 Kg * m/s

• 20000 kg * m/s

Multiple Choice

Remember p = mv. A 0.250 kg cart moving at 0.400 m/s has how much momentum?

• 0.1 kg-m/s

• 1 kg-m/s

• 10 kg-m/s

• 100 kg-m/s

Multiple Choice

What is the unit for mass?

• m/sec

• kg/sec

• kg

• kg m/sec

Multiple Choice

What is the unit for velocity?

• m/sec

• kg/sec

• kg/m

• kg m/sec

Multiple Choice

Remember p = mv. What is the unit for momentum?

• m/sec

• kg/sec

• kg/m

• kg m/sec

Multiple Choice

Which of the following has the least amount of momentum?

• An ant walking along the ground
• An ant at rest
• An elephant walking
• An elephant running

Multiple Choice

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.

Multiple Choice

Remember p = mv. When the velocity of an object is doubled, its momentum

• remains unchanged in accord with the conservation of momentum.

• doubles

• quadruples

• decreases