Work & Power Review

What is work in science?

• having a job

• using a force to make an object move

• a push or a pull

• stored energy

How do you calculate work? (W = ?)

• force + distance

• force - distance

• force x distance

• force $\div$  distance

Which number describes force?

• 392 J

• 293 N

• 23m

• 239 W

What is power in science?

• ability to do work or cause change

• a push or a pull

• the speed or rate of doing work

• being strong

How do you calculate power?

• Work + time

• Work - time

• Work x time

• Work  $\div$ time

What is the unit for power?

• newtons (N)

• Joules (J)

• meters (m)

• Watts (W)

_____ is the speed or rate of doing work

• Newton

• Energy

• Force

• Power

Ana, has a mass of 105 kg, is walking up a set of stairs that are 5 meters high. What is Ana's work?

• 105 N

• 4425 J

• 1195.9 J

• 5145 J

Tags

NGSS.HS-PS3-1

If 10, 000 J of work is done by a bulldozer outputting 1000 N of Force, what is the displacement?

• 10 m

• 20 m

• 100 m

• 200 m

Tags

NGSS.HS-PS3-2

How much power is used when a person has 100 kg moves 20 m over 2 seconds?

• 19600 J

• 9800 J

• 9800 W

• 0 W

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5