Forces and Motion Unit Review

Which of these would be different for an object if measured on the Earth and on the Moon?

• Mass

• Weight

• Volume

• Amount of matter an object contains

The force that holds objects close to Earth is called ---

• Mass

• Weight

• Gravity

• Work

Speed in a specific direction

• Velocity

• Acceleration

• Motion

• Force

Force = mass (x) acceleration. Calculate the force of a bowling ball hitting pins if it has a mass of 8kg and an acceleration of 3 m/s²?

• 2.3 N

• 24 N

• 16 N

• 25 N

Which of the following represents the velocity of a moving object?

• 30 m/s

• 20 m North

• 25 m/s²

• 15 m/s North

How much work is done if a lever lifts an object 3 meters with an input force of 9N? (work = force x distance)

• 27 J

• 27 m/s

• 3 J

• 0.33 J

A Fan does 5000 J of work for 100 seconds. How much power is the fan using in Watts? P = W / t

• 500,000 W

• 50 W

• 0.02 W

• 500 W

A push or pull on exerted on an object

• Work

• Force

• Motion

• Power

What type of simple machine is shown?

• Lever

• Pulley

• Inclined Plane

• Wedge

A man tries to ​step from a small boat onto a dock. When he ​steps forward, the boat moves backwards. Which of Newton's laws explains why this occurs?

• 1st

• 2nd

• 3rd