Forces and Newton Laws

Vocabulary 1

Force : a push or pull exerted by one object on another.

Friction : a force that opposes the motion of an object in contact with a surface.
Drag force : a force that opposes the motion of an object through a liquid or gas.
Net force : the combined effect of all the forces acting on an object.
Balanced force : forces that cancel each other out when acting together on a single object.
Unbalanced forces : forces that do not cancel each other out when acting together on a single object.
Inertia : the tendency of an object to oppose a change in motion.
Momentum : the mass of an object multiplied by its velocity.