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Work And Simple Machines
Test Description: Work and Simple Machine Quiz
Instructions: Answer all questions to get your test result.
1) Greg applies a force of 200 N to move a box 2 meters. How much work did he do?
A
100 J
B
400 J
C
100 N
D
400 N
2) Which of the following must happen for work to be done?
A
The object must move in the same direction as the force.
B
The object must move in the opposite direction of the force
C
The object must move, and there must be an output force.
D
The object must move, and the mechanical advantage must be greater than 1
3) What does a fixed pulley change
A
the size of a force
B
the direction of the force
C
the timing of the force
D
the speed of the force
4) When a screwdriver is used as a lever to open a paint can, what is changed as the work is done?
A
the size and direction of the input force
B
the size of the input force
C
the direction of the input force
D
power
5) What is a machine that is made of two simple machines?
A
simple machine
B
lever
C
inclined plane
D
compound machine
6) The rate at which energy is transformed is called what?
A
power
B
energy
C
joule
D
work
7) If two people lift identical stacks of books the same direction and one person does the job twice as fast which of the following is true?
A
efficiency
B
work input
C
work output
D
power
8) In which situation is a person doing work on an object?
A
a student walks while wearing a backpack that weighs 15N
B
a worker holds a box 1 m off the floor.
C
a school crossing guard raises a stop sign that weighs 10N.
D
A man exerts 350 N force on a rope attached to a house
9) What is an inclined plane that is wrapped around a cylinder?
A
whel and axle
B
lever
C
inclined plane
D
screw
10) What is the unit for power?
A
watt
B
joule
C
newton
D
Newton Meter
*select an answer for all questions
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