Speed & Newton's Laws of Motion

An object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by a net external force.

A force that opposes the motion of an object, acting parallel to the surface of contact.

A vector quantity that refers to the rate at which an object changes its position, including both speed and direction.

The total force acting on an object when all the individual forces are combined.

The tendency of an object to resist changes in its state of motion; the greater the mass, the greater the inertia.

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F=ma).

For every action, there is an equal and opposite reaction.

Speed is a scalar quantity that refers to how fast an object is moving, while velocity includes both speed and direction.

The attractive force between two objects due to their masses; it pulls objects toward each other.

When two people push on opposite sides of a box with equal force, the box does not move.