Physical science- Laws of Motion (ch.3 review)

Front

What happens to your weight if Earth's mass is cut in half?

Back

Your weight decreases because gravitational force decreases.

Front

What does Newton's 1st law state?

Back

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

Front

How is momentum calculated?

Back

Momentum is calculated as the product of mass and velocity (p = mv).

Front

What happens to acceleration if you double the mass of an object while applying the same force?

Back

The acceleration is cut in half.

Front

What is a force?

Back

A force is any push or pull on an object.

Front

What is Newton's 2nd law of motion?

Back

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

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.

Front

What is the unit of momentum?

Back

The unit of momentum is kg-m/s.

Front

What is the relationship between force, mass, and acceleration?

Back

Force equals mass times acceleration (F = ma).

Front

What does Newton's 3rd law state?

Back

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