Review of Forces and Energy, Work, and Power

At which point is potential energy greatest?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-2

As mass increases, KE ...

• increases

• decreases

• stays the same

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

As the velocity of an object decreases its KE will...

• increase

• decrease

• stay the same

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which would have the LEAST gravitational potential energy (GPE)?

• A ball sitting on the ground

• Moon viewed from the Earth

• An airplane flying 30,000 feet above the ground

• A rock sitting on top of Mt. Everest

Tags

NGSS.MS-PS3-2

If a student uses 10 Newtons of Force to push a chair 5 meters, how much is work is being done?

• 2 Joules

• 0.5 Joules

• 50 Joules

• 20 Newtons

Tags

NGSS.MS-PS2-2

Work is measured in which unit?

• Kilogram

• Joule

• Newton

• Watt

Tags

NGSS.HS-PS2-1

work is done when

• the object you apply a force on moves

• any force is applied to an object, regardless if it moves or not

• the force is zero

• the force and direction of motion are perpendicular

What happens to the amount of work done if I apply the same force but over twice the original distance?

• The work done doubles

• The work done halves

• The work done remains the same

• The work done quadruples

Answer explanation

If the same force is applied over twice the original distance, the work done doubles because work done is directly proportional to the distance over which the force is applied.

A 16 N force is applied to an object and 96 J of work is done. How far was the object moved?

• 6 m

• 16 m 

• 80 m 

• 1536 m 

Tags

NGSS.HS-PS3-2

How much work does an elephant do while moving a circus wagon 20 meters with a pulling force of 200N?

• 4000 joules

• 10 joules

• 220 joules

• 180 joules

Tags

NGSS.MS-PS2-2