Science-Work Simple Machines Question Preview (ID: 45091)


Work Simple Machines. TEACHERS: click here for quick copy question ID numbers.

Which of these is an example of work being done on an object?
a) Pushing a child on a swing.
b) Holding a heavy piece of wood at a construction site.
c) Trying to push a car that doesn’t move out of deep snow.
d) Holding a door shut on a windy day so it doesn’t blow open.

_________ is the ability to cause change
a) a. Work
b) b. Joules
c) c. Energy
d) d. Power

Work is measured in__________?
a) a. Meters.
b) b. Pounds.
c) c. Joules
d) d. Newtons

________ is a simple machine that consists of a bar that pivots at a fixed point.
a) a. Lever
b) b. Pounds.
c) c. Fulcrum
d) d. Wheel and Axle

An ideal machine would have an efficiency of ________.
a) 1 %
b) 2%
c) 10%
d) 100%

The rate at which work is done (or energy is transformed) is called __________.
a) a. Power
b) b. Joules
c) c. Watts
d) d. Energy

___________ is the transfer of energy to an object by using a force that causes the object to move in the direction of the force.
a) a. Work
b) b. Joules
c) c. Energy
d) d. Power

____________ is a simple machine that is straight, slanted surface which facilitates the raising of loads.
a) a. Pulley
b) b. Fulcrum
c) c. Screw
d) d. Inclined Plane

___________ is the point on which a lever pivots.
a) a. Pulley
b) b. Fulcrum
c) c. Screw
d) d. Inclined Plane

_________ is an inclined plane that is wrapped in a spiral around a cylinder.
a) a. Pulley
b) b. Fulcrum
c) c. Screw
d) d. Inclined Plane

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