Contact Force that requires two pieces of matter to touch.
Magnets need to require to have two pieces of matter to touch.
Friction is the force that results when two materials rub against each other or when there contact prevents sliding.
If two magnets are on the opposite side they won't have friction.
Non-contact force is a force that acts a distance.
Magnetic forces, gravity, and electric forces are examples of non-contact forces.
The force of attraction between any two objects is called gravity.
When an apple drops it will fall fast to the ground. When a feather falls it will fall slowly to the ground.
The rate at which the speed or the direction of motion of an object changes over time is a acceleration.
A car will usually have a acceleration when it goes faster and slower, while you drive.
The tendency of an object to resist any change in motion is known as intertia.
A statue resists motion.
Simple machine is a machine made up of one or two parts.
A washing machine is a simple machine to help make you're life easier.
Lever is a time of simple machine in which a bar moves around fixed point or support called a fulcrum.
You can use a lever to push something up into the air.
Pulley is a simple machine sonsisting of a rope or cable that runs around a grooved wheel.
You can use a pulley to lift up a bucket.
Wheel and Axle is a simple machine made up of a circular object attached to a bar.
You can use a wheel and axle for a small go cart.
Inclined plane is a simple machine that consists of a flat surface with one and higher than the other. When you're on a skateboard and you go on a ramp youre on an inclined plane.
Wedge is a simple machine that can be made in one or two inclined planes. If a girl where's wedges she has an inclined plane on her foot.
A screw is a consisting of a smooth cylinder with tiny inclined plane wrapped around it.
