Unit 1 : Forces and Motion Review

Front

What is the net force of an object that is not moving?

Back

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Front

It takes more force to accelerate the iron man on the left than the iron man on the right because the iron man on the left has more mass. This best describes:

Back

Newton's second law, the law of acceleration

Front

What is the attractive force that exists between all objects that have mass?

Back

Gravity

Front

Action-Reaction forces occur:

Back

in all interactions between objects

Front

If an object is at rest, or moving with constant velocity, the forces acting upon it are _____________

Back

in equilibrium

Front

What is Newton's first law of motion?

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

Define inertia.

Back

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

Front

What is the formula for calculating weight?

Back

Weight = mass × gravity (W = mg)

Front

What does the law of universal gravitation state?

Back

Every point mass attracts every other point mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.