Work Review

What is the SI unit of measurement for Power?

• Volt

• Newton

• Joule

• Watt

What is the SI unit of measurement for Work?

• Volt

• Newton

• Joule

• Watt

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Select all that ARE examples of Work

• pushing a box 2 meters

• pulling a wagon 4 meters

• pushing a car but not being able to move it

• holding a 100 lb barbell over your head for 1 hour

You exert 1000 N of force trying to move a stalled car but you cannot move it. Is work being done?

• Yes

• No

• Maybe

• Not enough information

What is the formula for work?

• W = force * distance

• W = weight * gravity

• W = distance / time

• W = work / time

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

How much work is done on a 10N block that is lifted 5 meters by a pulley?

• 1 Joule

• 5 Joules

• 50 Joules

• 100 Joules

Tags

NGSS.MS-PS3-5

A machine does 100 J of work in 25 seconds. What is the power of this machine?

• 1 Watt

• 2 Watts

• 3 Watts

• 4 Watts

What is the formula for calculating power?

• Power = force * distance

• Power = work / time

• Power = time * force

• I don't pay attention in class

You exert a force to pull a wagon 30 meters up a hill. Is work being done?

• Yes

• No

• Maybe

• Not enough information

As the time to do work ____________, the amount of power used increases

• increases

• decreases

• stays constant

• accelerates