Definitions
No moving parts. It is often called a ramp.
What is an inclined ramp
water wells, flag poles, elevators, rock climbing
a pulley
a push or pull
force
simple machines have many moving parts
false; they are simple so they have few to no moving parts
how does a knife function as a wedge?
Usually made by joining two inclined planes together. Thick on one end and thins out to a sharp edge at its tip.
What is a wedge?
wheelchair ramp, slide, escalator
inclined plane
a tool that does work
a simple machine
simple machines help people do work
true
What simple machine would a person use to lift a heavy rock?
a lever
A very small simple machine which has ridges, called threads, that wind around it.
What is a screw?
door stopper, axe, knife
wedge
two or more simple machines
compound machine
Simple machines are run by the energy of a person (muscle energy)
true; we need to do work to make a simple machine work
Michelle needs to move heavy boxes into a truck. Which simple machine will she most likely use?
an inclined plane
A simple machine that has a straight bar that moves on a fixed point called a fulcrum.
What is a lever?
light bulb, water faucet, bottle lid
screw
the amount of energy needed to do something
work
simple machines make work harder
false; they make work easier
what simple machine is a slide an example of?
an inclined plane
Two parts working together; made of a wheel attached to a rod.
What is a wheel and Axel?
tweezers, shovel
lever
when both objects use an equal amount of force
balance
simple machines are two or more compound machines
false; a compound machine uses two or more simple machines
which simple MACHINES can be found on a can opener?
what is a lever, wedge, wheel and axle