Simple Machines
What is a flat, slanted surface?
inclined plane
gravity
What is an object that makes work easier?
A simple machine
If I were to drop a pencil, why does it fall straight to the ground?
Because of gravity
What is a wheel with a groove that holds a rope?
Pulley
What is the ability to do work?
Energy
What is done when a force moves an object over a distance?
work
If I blow a tissue across a desk, is that doing work? Why?
Yes, because the tissue moved
What is a wheel with a rod running through it?
Wheel and axle
What is a push or a pull?
force
Lever
Does carrying a box of pencils use more or less work than carrying a box of weights? Why?
More, because the weights are heavier and require more force to move them
What is one or more inclined planes used to force materials apart?
Wedge
What is the change in a position?
Motion
What is the point on which the bar is turned?
Fulcrum
If I tried to pick up a car, and it did not move, would I have done any work? Why?
No, because the car did not move
What is an inclined plane wrapped around a cylinder?
Screw
What is the force that resists the movement of objects against each other?
friction
The amount of effort needed on a lever is determined by the _____________ between the effort and the fulcrum
distance
Would bowling be harder or easier with socks instead of bowling shoes? Why?
Harder, the socks have less friction and your feet would not be still enough to get a good throw