Forces and Motion Review

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

Unbalanced forces are forces that cause an object to change its motion because they are not equal in size and direction.

The object's motion will change, which can include starting to move, stopping, or changing direction.

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

Friction is a force that opposes the motion of an object, often caused by the contact between surfaces.

Gravity is a force that pulls objects toward each other, such as the pull of the Earth on objects.

Speed is how fast an object is moving, while velocity includes both speed and direction.

A slope is a surface that is at an angle, which can affect how objects move on it.

Balanced forces are equal in size and opposite in direction, resulting in no change in motion.

Pushing a stationary car to get it moving is an example of an unbalanced force.