Simple Machines Question Preview (ID: 35288)


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For work to be done ona n object,
a) some force need only be wxerted on the object.
b) simple machinethe object must move some distance as a result of a force.
c) the object must move, whether or not a force is exerted on it.
d)

Flat, sloped surface, allows you to exert input force over a longer distance.
a) inclined plane
b) screw
c) pulley
d) lever

The threads of this simple manchine, act like an inclined plane to increase the distance over which input force is exterted.
a) lever
b) pulley
c) gear
d) screw

How many classes of levers are there?
a) 5
b) 3
c) 4
d) 2

A rigid bar that is free to pivot, or rotate.
a) pulley
b) gear
c) lever
d) wedge

The fixed point that a lever pivots around.
a) fulcrum
b) bar
c) center of gravity
d) force

A simple machine made of a grooved wheel with a rope wrapped around it.
a) lever
b) gear
c) pulley
d) fulcrum

Two connected objects that rotate around an axis.
a) gear
b) lever
c) pulley
d) wheel and axle

An example of a wheel and axle.
a) flag pole
b) screwdriver
c) can opener
d) wheel barrow

A machine that combines two or more simple machines.
a) wheel and axle
b) pulley
c) compound
d) crane

If you exert a force of 20 N to push a desk 10 m, how much work do you do on the desk?
a) 200 j
b) 200 w
c) 30 j
d) 10 w

How can a hockey stick be considered a machine?
a) It indreases force.
b) It multiplies distance.
c) It changes direction
d)

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