Unit 3 Review Study Guide

Which does an applied force move?

• Same direction as the force

• Different direction

• Perpendicular to the force

• None of the above

1. 30 N block is being pushed with a distance of 3 m. How much work was done? 

(Use the formula W = FxD, and J = Joules, which is the unit for energy)

• 20 J

• 30 J

• 90 J

• 50 J

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NGSS.MS-PS3-5

Simple machines make work easier by…

• Adding energy

• Increase force

• Reduce speed

• Increasing the distance over which a force is applied.

The force a person applies to a simple machine is also known as…

• Friction

• Distance

• Newtons

• Input force

What type of simple machine are scissors a great example of?

• Inclined planes and wedges

• Two levers and two wedges

• One inclined plane and two wedges.

• All of the above.

How is potential energy different from kinetic energy? (Which property below is what makes it different?)

• Mass

• Work

• Power

• Position

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NGSS.MS-PS3-2

A ball is dropped from the top of a building. When does the ball have the most kinetic energy?

• At the beginning at the top

• Half way down

• Right as it hits the ground

• After it hits the ground.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What force causes mechanical energy to be lost?

• Friction

• Work

• Output force

• Kinetic energy

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A ball is dropped from the top of a building and lands on the ground without bouncing. When does the ball have the least potential energy?

• At the beginning at the top

• Half way down

• Right as it hits the ground

• After it hits the ground.

Tags

NGSS.MS-PS3-2

A ball is dropped from the top of a building. When does the ball have the most potential energy?

• At the beginning at the top

• Half way down

• Right as it hits the ground

• After it hits the ground.

Tags

NGSS.MS-PS3-2