Week 18 Quiz - Momentum, CO2 Cars and Rube Goldberg

First Name

Last Name

Period

• 1
• 2
• 3
• 4
• 5

If a 2kg ball is resting on the top of a ramp that is 2 meters high, what is the potential energy? (m x g x h) *note: assume gravity is 10 m/s^2

• 20 J
• 10 J
• 40 J

Which of the following best explains how Newton’s Third Law helps a CO₂ car move?

• The gas pushes out the back, and that pushes the car forward.
• The gas pulls the car forward when it is released.
• The gas comes out the front, so the car goes forward.
• The car moves forward because the track is slanted.

What are ways you can make a CO2 go faster? Select all that apply.

• More mass
• Less Mass
• More friction
• Less Friction
• More force

If the total energy at the beginning of the Rube Goldberg device at the start is 100J, the energy at the end should be ______?

• 100 J
• 50J
• 1000 J

If the force to launch a 10kg CO2 car was 20N, what was the acceleration? Force = mass x acceleration

• 2 m/s2
• 200 m/s2
• 100 m/s2

If the 2kg ball is moving at 1m/s what is its kinetic energy? (KE=1/2 mv^2)

• 1 J
• 2 J
• 4 J
• 5 J

Why does a heavy truck have more momentum than a passenger car moving at the same speed?

• A) It has more wheels
• B) It travels faster
• C) It has more mass
• D) It uses more fuel