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Power Notes

Power Notes

Assessment

Presentation

Science

8th Grade

Medium

NGSS
MS-ESS1-1, MS-PS3-5, MS-PS2-2

+6

Standards-aligned

Created by

Whitney Price

Used 6+ times

FREE Resource

5 Slides • 7 Questions

1

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LESSON: POWER

2

Multiple Choice

What is needed to calculate work?

1

time and distance

2

speed and distance

3

force and direction

4

acceleration and velocity

3

Multiple Choice

What is the unit of measurement for work?

1

meters

2

newtons

3

m/s

4

Joules

4

Multiple Choice

You have to push with 15 N of force to move it 10 meters. How much work do you do?

1

15 Joules

2

150 Joules

3

1.5 Joules

4

.67 Joules

5

Multiple Choice

500 J of work is done by a person who uses a force of 50N to move a box, how far does it go?

1

10 m

2

0.1 m

3

25,000 m

4

10 J

6

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• Power is the rate at which work is done or how much work is done in a certain
amount of time.

• Power is measured in watts.
power = work
time

p = w / t

POWER

​Write this slide in your notbook.

7

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Practice Power Problems

1. While rowing in a race, John does 3960 J of work on the oars in 60.0 s. What is his power output in watts?

​Work this problem out in your notbook.

8

Math Response

While rowing in a race, John does 3960 J of work on the oars in 60.0 s. What is his power output in watts?

Type answer here
Deg°
Rad

9

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Practice Power Problems

2. Using a jack, a mechanic does 5350 J of work to lift a car .500 m in 50.0 seconds. What is the
mechanic’s power output?

​​​Work this problem out in your notbook.

10

Math Response

Using a jack, a mechanic does 5350 J of work to lift a car .500 m in 50.0 seconds. What is the
mechanic’s power output?

Type answer here
Deg°
Rad

11

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Practice Power Problems

3. Anna walks up the stairs on her way to class. She weighs
565 N and the stairs go up
3.25 m vertically. What is her
power output if she climbs the stairs in 12.6 s?

​​​Work this problem out in your notbook.

12

Math Response

Anna walks up the stairs on her way to class. She weighs 565 N and the stairs go up
3.25 m vertically. What is her
power output if she climbs the stairs in 12.6 s?

Type answer here
Deg°
Rad
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LESSON: POWER

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