Physics Unit 3 Review

As a roller coaster car travels down a hill,which type of change in energy allows it to speed up?

• Potential energy changing into heat energy.
• Potential energy changing into kinetic energy.
• Kinetic energy changing into heat energy.
• Kinetic energy changing into potential energy.

On a distance-time graph, what does a horizontal line indicate?

• Object increased  in speed
• Object decreased in speed
• Object stopped moving.
• Object changed direction.

Two factors that determine work are

• force

• acceleration

• mass

• distance

• velocity

units for work are

• newtons

• joules

• meters

• seconds

if you push a cart with a force of 60 N for 2 m... how much work have you done

• 120 J

• 30 J

• 120 N

• 30 N

work transfers

• sweat
• energy
• velocity
• effort

What is the formula for work?

• Force = work x distance
• Distance = force x work
• Work = force x distance
• Work = force x mass

Fred kicks a ball with a force of 20N to George, who is 5M away. How much work was done to the ball?

• 25J

• 100J

• 4J

• 75J

If 40N of force is applied to Rollo Koster's 10 kg cart over a distance of 50 meters, how much work is done?

• 8000J

• 8000N

• 4000J

• 2000J

Gravitational potential energy depends on the ________ and ________ of the object. 

• Height and mass
• Friction and movement
• Mass and Movement
• Height and Friction