Work and Power

A 900N mountain climber scales a 100m cliff. How much work is done by the mountain climber?

Read the picture, then fill in the blank: The ability to work or cause change is _

A horse performs 15000 joules of work pulling a wagon for 20 seconds. What is the horse's power?

________________ is the rate at which work is done.

• Power

• Work

• Time

• Energy

_________ is the energy due to an object’s position above

the earth’s surface.

• Mechanical

• Gravitational

• Kinetic

• Chemical

What must occur for work to be generated?

• An object must accelerate

• An object must move

• An object must have more mass than 10g

• An object must change directions

If you push a cart with a force of 10N for 2m, how much work have you done?

• 20J

• 12 J

• 5J

• No work is being done.

A box is pushed across the floor a distance of 8 m with a force of 55 N in 7 s. What is the work done?

• 440 J

• 440 W

• 62.9 J

• 62.9 W

How do you generate more power?

• Do more work

• Do work in less time

• Do less work

• Do work in more time

What does work transfer?

• Velocity

• Energy

• Mass

• Speed