Impulse and Momentum

Which of the following has the most momentum?

• a more massive thing moving slowly

• a less massive thing moving slowly

• a less massive thing moving fast

• a more massive thing moving fast

If a big truck is driving down the highway and runs into an insect, which of the following is NOT true?

• The truck slows down when it hits the insect.

• They both accelerate at the same rate.

• They both experience the same force.

• They both experience the same change in momentum.

Two cars are driving down the street in opposite directions. Unfortunately, they run straight into each other. What is the change in the total momentum of the two cars from before they crash to after they crash? One car is 1,000 kg, and the other car is 1,500 kg. They are both going 10 m/s.

• 0 kg m/s

• 50 kg m/s

• 250 kg m/s

• 5,000 kg m/s

A 90 kg man is standing still on friction less ice. His friend tosses him a 10 kg ball, which has a horizontal velocity of 20 m/s. After catching the ball, what is the man's velocity?

• 0 m/s

• 1.8 m/s

• 2 m/s

• 4.5 m/s

How can you increase the linear momentum of something?

• Increase its mass.

• Increase its velocity.

• Apply a net force to it

• a & b

If a big truck is driving down the highway and runs into an insect, which of these is true?

• The truck applies more force to the insect than the insect applies to the truck.

• The insect's momentum changes more than the truck's.

• The insect accelerates more than the truck.

• The insect applies a greater impulse to the truck than the truck applies to the insect.

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

An egg is thrown at a wall and at a bed sheet. The force of impact will be

• Greater against the wall

• Greater against the sheet

• Force is equal

A(n) _________________ causes and is equal to a change in momentum

• joule

• force

• watt

• impulse

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

• size and shape

• mass and speed

• mass and velocity

• mass and energy