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Unit 3 Work Review
Test Description: Questions over work & power for unit 3 chapter 14 in physical science
Instructions: Answer all questions to get your test result.
1) The SI unit of power is
A
watts
B
joules
C
m/s/s
D
N/m
2) The end of a lever that you push down is the
A
input force
B
output distance
C
fulcrum
D
output force
3) Which below is NOT a simple machine?
A
pulley
B
wheel & axle
C
fulcrum
D
inclined plane
4) Which below is NOT an example of work being done?
A
pulling a sled behind you in the snow
B
pushing a shopping cart in a store down an aisle
C
pushing your kid brother on a swing
D
holding a trophy above your head
5) Which below does the MOST work
A
pushing a 20 N box 5 meters
B
pulling a 40 N chair 1 meter
C
carrying a 20 N purse 200 meters
D
pushing with 200 N of force on a wall that doesn't move
6) You set up a block and tackle pulley system that supports a 200 N weight and consists of 2 pulleys with 3 rope sections supporting the weight. The IMA of the pulley is
A
3
B
0
C
2
D
200
7) You push a box 15 meters in 4 seconds using 25 N of force. The power exerted is
A
1500 W
B
375 W
C
4 W
D
93.8 W
8) 1 kilowatt = ?
A
1,000 W
B
746 W
C
1,000,000 W
D
1 horsepower
9) A machine with an AMA of 6 ...
A
Has a smaller output force than input force
B
Increases your input force by 6 times
C
Has an input distance of 6 cm and an output of 12 cm
D
Is a lever with no fulcrum
10) The person who coined the term
A
Galileo
B
Sir Isaac Newton
C
Alexander Graham Bell
D
James Watt
*select an answer for all questions
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