Forces and Motion

To move a glass across a table, an unbalanced force must be applied. This force overcomes the friction between the glass and the table, allowing it to move.

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

If a net force of 0 is applied, the object will stay still. This is because the forces acting on the object are balanced, resulting in no motion.

Inertia is the tendency for an object to resist a change in motion. It is the correct choice.

Friction is the force that works to slow down an object moving on a surface.

If two forces are pulling on each other but not causing movement, the forces are balanced.

To determine the Earth's movement from a reference point on the ground, look at the Sun. Its apparent motion across the sky indicates the Earth's rotation.