Energy, Work, Power and Efficiency
Authored by Charles Martinez
Science
6th - 8th Grade
NGSS covered
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36 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Work is measured in which units?
Newtons
Joules
Watts
Joule/sec
Tags
NGSS.MS-PS3-5
NGSS.MS-PS3-4
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Power is measured in which units?
Newtons
Joules
Watts
Joule/sec
Tags
NGSS.MS-PS3-5
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
____ is being done when a force is exerted on a wagon while it is being pulled up a hill.
Power
Force
Work
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
You use 950 J of energy to push a sofa. If it took you 5 sec to move the sofa, what was your power?
190 J
4750 J
4750 W
190 W
Tags
NGSS.MS-PS3-5
NGSS.MS-PS3-1
NGSS.MS-PS2-1
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A runner exerts 240,000 J when she runs for 10 min. What is the runner's power?
400 W
600 W
400 J
600 J
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The power rating of an electric lawnmower is 3000 W. If the lawnmower is used for 60 sec, how many joules of work can it do?
270,000 W
270,000 J
180,000 J
33.3 W
Tags
NGSS.MS-PS3-5
NGSS.MS-PS3-4
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
You do 90 joules of work in 30 seconds. How much power have you generated?
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