Forces
push or pull
What is a force?
A change of position
What is motion?
The force you apply to cause a simple machine to do work
What is effort?
a wheel with a rod running through the wheel
What is a wheel and axle
a flat sloped surface
What is a inclined plane?
The force that pulls all objects toward it
What is gravity?
__ is done when a force moves an object over a distance.
What is work?
The weight of an object being moved
What is a load?
wheelbarrow, nutcracker
What are second class levers?
an axe
What is a wedge?
The force that resists the movement of objects against each other.
What is friction?
The ability to do work.
What is energy?
a bar that turns on a point
What is a lever?
one or more inclined planes used to force materials apart
What is a wedge?
a pulley that is attached to something and cannot move
What is a fixed pulley?
You put forth an ____to cause the wagon to move.
What is an effort?
An object that is not moving
What is rest?
The point a bar turns on
What is a fulcrum?
a simple machine that has a grooved wheel
What is a pulley?
combines fixed pulleys and moveable pulleys
What is a block and tackle?
Two forces we experience everyday.
What is gravity and friction?
A ___mass requires a ____force to move it.
What is greater?
A paint-can opener, a crowbar, and the claws on some hammers
What is first class lever?
fishing pole and broom
What are third-class levers?
inclined plane wound around an axle
What is a screw?