Front

Collision: The moment when two objects hit each other.

Back

Collision

Front

What is a force?

Back

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

Front

What does it mean to infer?

Back

to reach a conclusion using observations and background knowledge

Front

Velocity:

Back

speed in a particular direction

Front

Net force:

Back

The sum of all forces acting on an object.

Front

Friction is:

Back

a force between an object and the surface it is moving over

Front

Balanced force: all forces on an object equal out, so it doesn't move.

Back

Balanced force

Front

Unbalanced force: Forces on an object are NOT equal - object moves.

Back

Forces acting on an object are NOT equal - object moves.

Front

Inertia: An object's tendency to resist changes in motion.

Back

An object's tendency to resist a change in its motion.

Front

Newton's 1st law: Objects in motion stay in motion, and at rest stay at rest, unless acted on by an external force.

Back

Objects in motion stay in motion, and at rest stay at rest, unless acted on by an external force.