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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
lifting a book bag off the floor
C
the moon orbiting the Earth
D
pushing a box from the bottom of the hill to the top of the hill
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
decreases the force required and changes the direction of the force required
C
doubles the force required to lift the block
D
decreases the force required to lift the block
3) A slanted surface used to raise an object is a (n) _______________.
A
efficiency board
B
wedge
C
inclined plane
D
effort ramp
4) A device that does work with only one movement and changes the direction of a force is a (n)
A
compound machine
B
simple machine
C
screw
D
effort machine
5) A bar that is free to pivot about a fixed point is a
A
ramp
B
wedge
C
lever
D
fulcrum
6) The rate at which work is done is called
A
effort time
B
force
C
power
D
efficiency
7) The work output of a machine divided by the work input is the _________ of the machine.
A
force
B
effort
C
power
D
efficiency
8) The amount by which a machine multiplies an input force is called the _______________.
A
mechanical advantage
B
fulcrum
C
efficiency factor
D
resistance force
9) An inclined plane with one or two sloping sides forms a machine called a _______________.
A
pulley
B
ramp
C
wedge
D
lever
10) An inclined plane wrapped around a cylinder post is a __________________.
A
wedge
B
screw
C
pulley
D
ramp
11) A photovoltaic converts __________________________ energy.
A
radiant to electrical
B
radiant to thermal
C
electrical to radiant
D
chemical to electrical
12) A blimp flying around over the Super Bowl has ____________________ energy.
A
kinetic and electrical
B
kinetic and chemical
C
kinetic and potential
D
potential and radiant
13) When you see a change in the environment you know that _____________ has been transferred.
A
energy
B
heat
C
force
D
motion
*select an answer for all questions
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