
Work & Power
Authored by Will Brennan
Science
8th Grade
Used 25+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The equation for work is
work = power x mass
work = power / time
work = force x distance
work = distance x time
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The equation for POWER is
power = mass x time
power = work / time
power = time / work
power = work x time
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In which of these cases is work being done?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A roller coaster whose average speed is 32 m/s is at the top of a 72m hill and weighs 966N. At the top of the hill the coaster car has ___________________ energy.
only kinetic energy
only potential energy
mostly kinetic energy
both kinetic and potential energy
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which statement does not illustrate power?
A farmer plowing the rice field all day.
A Siberian husky pulling a sled all day.
A principal sitting on a chair while observing several classes all day.
A teacher encoding his power point presentation in his laptop all day.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A 100 N force is applied to move an object a horizontal distance of 5 meters at constant speed in 10 seconds. How much power is done?
50J
50W
500J
500W
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which statement illustrates work done?
A weightlifter holds a barbell above her head.
A teacher applies a force to a wall and becomes exhausted.
A rolling marble hits a note card and moves it across a table.
A waiter carries a tray full of meals across a dining room at a constant speed.
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