Forces and Motion

A force is a push or pull that can change the motion of an object.

Motion is the change in position of an object over time.

When two forces are equal, they cancel each other out, and the object does not move.

Gravity is a force that pulls objects toward each other, like the Earth pulling us down.

Friction is a force that opposes motion between two surfaces that are in contact.

Pushing a door open is an example of a push force.

Pulling a wagon is an example of a pull force.

A stronger force can cause an object to move faster or change direction more quickly.

Inertia is the tendency of an object to stay at rest or keep moving unless acted upon by a force.

A car driving down the street is an example of motion.