Understanding Newton's Laws of Motion

Front

What two variables define force?

Back

Mass and acceleration.

Front

When force is 20 N, mass is 5 kg, what is acceleration? (Use F = ma)

Back

4 m/s/s.

Front

Force always comes in________

Back

Pairs.

Front

What is Newton's 1st law?

Back

Inertia.

Front

Why don't moving objects keep moving forever?

Back

There is almost always an unbalanced force acting on them.

Front

What is the formula for calculating force?

Back

F = m * a.

Front

What does inertia refer to in Newton's 1st law?

Back

The tendency of an object to resist changes in its state of motion.

Front

What is the relationship between mass and acceleration in Newton's 2nd law?

Back

Acceleration is directly proportional to force and inversely proportional to mass.

Front

What is an unbalanced force?

Back

A force that causes an object to change its state of motion.

Front

What is the unit of force in the SI system?

Back

Newton (N).