Work & Power Review

Niagara Falls is a good example of

• Kinetic energy being transformed into potential energy
• Potential energy being transformed into kinetic energy
• Energy being created
• Energy being destroyed

Tags

NGSS.MS-PS3-5

 The law of conservation of energy states that when one form of energy is converted into another,

• Energy is destroyed in the process
• Energy is created in the process
• No energy is destroyed in the process
• Energy is lost in the process

Tags

NGSS.MS-PS3-5

What is the work done when a 20-N force pushes a cart 3.5 m?

• 70J
• 6.8J
• 23.5J
• 17.5J

Work is

• having a job

• movement

• energy transfer

• energy transfer to an object

Tags

NGSS.MS-PS3-5

The ( ) the force the ( ) work is done

• less, more

• smaller, more

• bigger, more

• bigger, less

If something is shifted a long way then there is ( ) work is being done.

• less

• more

• same

• none

Two factors that determine work are

• amount of the force, and effort used
• amount of the force, and type of force
• mass, and distance
• amount of force and distance moved

It takes 20 N of force to move a box a distance of 10 m. How much work is done on the box ?

• 200 J
• 20.0J
• 2 J
• 200 N

Tags

NGSS.MS-PS3-5

You apply a force of 18 N to a dresser and move it 3.0 m. How much work did you do on the dresser?

• 54 N
• 6.0 J
• 54 J
• 27 J

Tags

NGSS.HS-PS3-1

The unit or label for work is

• netwons
• joules
• meters
• seconds

Tags

NGSS.HS-PS3-2