Force
A PUSH or PULL that changes the position of an object
Force
Forces on an object that do not change the motion of the object.
Balanced forces
A device with a few or no moving parts that make work easier by changing the amount of force or the direction of force.
A triangular shaped object (made of two inclined planes back to back) used to hold things in place or split an object apart
Wedge
Example of a screw
lightbulb, screw
Type of force that that pulls objects towards the center of the Earth.
Gravity
Forces on an object that cause a change in the motion of the object.
Unbalanced forces
A bar that rests on a fulcrum used to lift a heavy object up.
An inclined plane wrapped around a cylinder used to hold objects together.
Example of a Wheel and Axle
car tires or a flag pole
A type of force where one surface or object is rubbing against another.
Friction
How an object moves from one place to another
Motion
A rope over a wheel used to lift objects and down.
Pulley
A kind of ramp that connects a lower level to a higher level.
Example of an inclined plane
wheelchair ramp, slide
A wheel rotating around a rod (or axle). It is used to move heavy objects from one place to another.
Wheel and Axle
Example of a pulley
blinds, elevators, water wells
Example of a wedge
Ax, knife, scissors
Seesaw