Work Energy Power Review

Wile E. Coyote eats a healthy breakfast before running after the Roadrunner. What is the energy transformation?

• Chemical potential to kinetic

• Kinetic to gravitational potential

• Elastic to kinetic

• Chemical potential to thermal

Tags

NGSS.MS-PS3-5

A child is at the top of a smooth slide and then slides down. At the bottom, the child comes to a stop when they reach the grass. What is the energy transformation?

• elastic potential to kinetic to gravitational potential

• gravitational potential to kinetic to elastic potential

• kinetic to gravitational potential to kinetic

• gravitational potential to kinetic to thermal

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A rock falls off a table and lands on a spring, squishing it. What is the energy transformation?

• gravitational potential to kinetic to gravitation potential

• kinetic to elastic potential to gravitational potential

• gravitational potential to kinetic to elastic potential

• chemical to thermal

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

A 3.0 kg ball is on a table 1.5 m above the ground. What is its gravitational potential energy?

• 4.5 J

• 44.1 J

• 3.4 J

• 29.4 J

How much work is produced when 350 N is used to move a car 5 m (W=Fd)?

• 70 J

• 1750 J

• 355 J

• 175 J

The rate (how fast) at which work is being done.

• Power

• Joules

• Work

• Newton

• No choice is correct

What are the units for the power formula:

power=work/time

• W=s/J

• J=W/s

• J=s/W

• W=J/s

A 5000N block is lifted 10 m. Calculate the work done.

• 50000 J

• 5000 J

• 500 J

• 50 J

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What is power?

• transfer a force through a distance

• the rate of speed 

• the rate of work being done

• transfer of space over time

Tags

NGSS.MS-PS3-5

Work is measured in which unit?

• Kilogram

• Joule

• Newton

• Watt