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Power Problems

Authored by Lisa Thompson

Science

8th Grade

NGSS covered

Power Problems
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25 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

You do 90 joules of work in 30 seconds. How much power have you generated?

30 watts

3 watts

120 watts

270 watts

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

You move a 0.8 kg object five meters in 4 seconds. How much power have you generated?

160 watts

10 watts

6.4 watts

17 watts

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Which of the following would produce the most power?

mass of 10 kilograms lifted 10 meters in 10 seconds 

mass of 10 kilograms lifted 10 meters in 5 seconds

mass of 5 kilograms lifted 10 meters in 5 seconds

mass of 5 kilograms lifted 5 meters in 10 seconds

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-4

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The equation for POWER is

power = mass x time

power = work / time

power = time / work

power = work x time

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A unit of electrical power is the

a) ohm

b) volt

c) watt

d) amp

6.

MATH RESPONSE QUESTION

1 min • 1 pt

What is the power output in Watts of a lightbulb connected in series to a 1.5 V battery if the current flowing through the circuit is 0.5 A? Record your answer. Be sure to use the correct place value.

Mathematical Equivalence

ON

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Electrical power can be calculated using

Resistance x Voltage

Voltage x Current 

Voltage ÷ Current

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