Forces Review

Front

What is mass?

Back

Mass is a measure of the amount of matter in an object, and it never changes regardless of location in the universe.

Front

What is weight?

Back

Weight is the force exerted by gravity on an object, which can change depending on the object's location (e.g., Earth vs. Moon).

Front

Why does a person weigh less on the Moon than on Earth?

Back

A person weighs less on the Moon because the Moon has less mass and therefore less gravity.

Front

What does Newton's Third Law of Motion state?

Back

Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction.

Front

What is an example of Newton's Third Law of Motion?

Back

When Sally jumps on a trampoline, she exerts a force on the trampoline, and the trampoline exerts an equal but opposite force back on her.

Front

What is net force?

Back

Net force is the total force acting on an object after all the individual forces are combined.

Front

If a boy pulls with a force of 10 N and a girl pushes with a force of 20 N, what is the net force?

Back

The net force is 30 N in the direction of the girl.

Front

What is the formula for calculating net force?

Back

Net force = Force applied - Opposing force.

Front

What is inertia?

Back

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

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to accelerate, change direction, or change shape.