Energy Test #2 Review Question Preview (ID: 33845)
Study Notes Simple Machines-Complex Machines.
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Which one is NOT an example of work?
a) holding a cell phone
b) pushing a box
c) pulling a sled
d) lifting a bookbag
A single, fixed pulley
a) doubles force
b) reduces force
c) changes direction of force
d) reduces and changes direction of force
A slanted surface used to raise an object is called a
a) pulley
b) wheel and axle
c) inclined plane
d) wedge
A device that reduces force required to move an object is called a
a) complex machine
b) efficient machine
c) electrical machine
d) simple machine
A bar that is free to pivot about a fixed point is a
a) pulley
b) lever
c) inclined plane
d) wedge
An inclined plane with one or two sloping sides forms a
a) pulley
b) lever
c) screw
d) wedge
An inclined plane wrapped around a cylinder post forms a
a) lever
b) pulley
c) screw
d) wedge
A winding mountain road is an example of a
a) lever
b) inclined plane
c) wedge
d) wheel and axle
When two or more simple machines work together, they form a
a) complex machine
b) efficient machine
c) electrical machine
d) simple machine
Three simple machines listed are basically the same. Which one does NOT belong?
a) screw
b) inclined plane
c) wedge
d) wheel and axle
Unlike a fixed pulley, a movable pulley ______ the input force
a) reduces
b) increases
c) multiplies
d) doesn't change
The pivot point of a lever is called a
a) effort arm
b) resistance
c) fulcrum
d) force
Door knobs and faucet handles are examples of a
a) inclined plane
b) wheel and axle
c) pulley
d) lever
Terry is going to use a hammer to pull a nail out of a board. Which hammer will allow him to use the least amount of force?
a) short handle, large claw
b) short handle, small claw
c) long handle, large claw
d) the hammer will not change the force
Which simple machines make up a wheel barrow?
a) lever, incline plane, wheel and axle
b) wedge, wheel and axle
c) lever, wheel and axle
d) lever, pulley
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