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26 Cards in this Set

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work
Work is done on an object when a force moves the object through a distance.
_________ results when a force produces a movement in the direction of the force.
work
___________ is the force that is put into a simple machine.
effort force
What are the parts of a lever?
The parts of a lever are a bar and a fulcrum.
wheel and axle
A wheel and axle is made up of a large wheel attached to a smaller wheel or rod.
screw
Wrapping an incline plane around a pole is a screw.
A flat surface that has one end higher than the other is an ____________.
inclined plane
Two inclined planes placed back-to-back form a ________.
wedge
In a lever, the force that is used to move the bar is called the __________?
effort force
wedge
Two inclined planes placed back-to-back form a wedge.
A simple machine made up of a bar and a fulcrum is a ________.
lever
When the resulting end of a lever moves a shorter distance than the effort end, it moves with ___________?
a greater force
A _____ is made up of an inclined plane wrapped around a pole.
screw
To use a pulley to change both force and direction, you need ___________.
one fixed and one movable pulley
simple machines
The basic machines that make up other machines.
lever
A bar that turns around a fixed point.
When you turn a doorknob, you are using ___________?
a wheel and axle
fulcrum
The fixed point, or one that doesn't move, around which a lever turns.
inclined plane
A flat surface that has one end higher than the other.
The part of a lever around which the bar moves is the ________.
fulcrum
A wedge changes an effort force ________?
down to a resulting force sideways
effort force
The force which causes a lever to turn around a fulcrum from pulling or pushing the lever.
A large wheel connected to a smaller wheel is a _______.
wheel and axle
A basic device that can change the amount or the direction of force, or both at once, is a _______
simple machine
To raise a heavy load, you could use a system made up of one fixed ______ and several movable ones.
pulley
pulley
A pulley is made up of a rope or chain and a wheel around which the rope fits.