
PS chapter 12

Quiz
•
Science
•
9th - 12th Grade
•
Medium
Used 1+ times
FREE Resource
42 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If a person tries to lift a heavy box for 5 seconds and cant make it budge, the work done on the box is LESS THAN 0.
TRUE
FALSE-equal to
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Machines DECREASE the amount of energy that is needed to do work.
TRUE
FALSE-increase
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Because of friction, using machines INCREASES the amount of energy that is need to do work
TRUE
FALSE
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An arrangement of multiple pulleys causes the direction of the output force to be OPPOSITE to the direction of the input force.
TRUE
FALSE-same as
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the units of work
J
NxM
kgxm2/s2
all of the above
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following processes requires the most work?
A 10 kg weight rests on a table
A person holds a 1 kg weight still with outstretched arms.
A person lifts a 1 kg weight 1 m off the floor
A 10 kg ball is rolled across the floor at a constant speed for a distance of 10 m
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the units of power?
watts
horsepower
joules per second
all of the above
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