work
when a force changes the motion of an object
work
a wheel that turns on a post
wheel and axle
two or more simple machines put together
compound machine
the location of an object
position
What do machines do?
Change the direction of the force and change the amount of force you need
the ability to do work
energy
a simple machine that uses a wheel and a rope
pulley
a force that occurs when one object rubs against another
friction
a change of position
motion
What is a lever made out of?
load, fulcrum, force
a tool that makes work easier to do
machine
a flat surface that is raised at one end
inclined plane
a push or pull
force
how fast an object moves
speed
What is a Fulcrum?
the point where the lever turns
a machine with few or no moving parts
simple machine
two incline planes placed back to back
wedge
the pulling force between two objects
gravity
Why does our weight change on different plants?
because of gravity, the gravity pull is different on different planets.
What is a load?
Object being lifted or moved on a lever
a straight bar that moves on a fixed parts
lever
an inclined plane wrapped into a spiral
screw
the pull of gravity on an object
weight
Very smooth playground slides decrease ...?
Friction
What causes a bike to stop?
Friction