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Chapter 15-Part 1
Test Description: Review 14
Instructions: Answer all questions to get your test result.
1) Which one of the following is NOT an example of work being done?
A
pulling a sled across a field covered wth snow
B
the moon orbiting the Earth
C
pushing a box from the bottom of the hill to the top of the hill
D
lifting a book bag off the floor
2) A fixed simple pulley that is used to lift a block does which one of the following?
A
makes the block easier to lift by changing the direction of the force needed to lift it
B
doubles the force required to lift the block
C
decreases the force required and changes the direction of the force required
D
decreases the force required to lift the block
3) A slanted surface used to raise an object is a (n) _______________.
A
effort ramp
B
inclined plane
C
wedge
D
efficiency board
4) A device that does work with only one movement and changes the direction of a force is a (n)
A
simple machine
B
effort machine
C
compound machine
D
screw
5) A bar that is free to pivot about a fixed point is a
A
lever
B
ramp
C
wedge
D
fulcrum
6) The rate at which work is done is called
A
power
B
efficiency
C
effort time
D
force
7) The work output of a machine divided by the work input is the _________ of the machine.
A
power
B
efficiency
C
effort
D
force
8) The amount by which a machine multiplies an input force is called the _______________.
A
resistance force
B
fulcrum
C
mechanical advantage
D
efficiency factor
9) An inclined plane with one or two sloping sides forms a machine called a _______________.
A
ramp
B
lever
C
pulley
D
wedge
10) An inclined plane wrapped around a cylinder post is a __________________.
A
ramp
B
pulley
C
screw
D
wedge
11) A photovoltaic converts __________________________ energy.
A
radiant to thermal
B
chemical to electrical
C
electrical to radiant
D
radiant to electrical
12) A blimp flying around over the Super Bowl has ____________________ energy.
A
kinetic and potential
B
kinetic and chemical
C
potential and radiant
D
kinetic and electrical
13) When you see a change in the environment you know that _____________ has been transferred.
A
heat
B
force
C
motion
D
energy
*select an answer for all questions
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