10.3 Review (Newton's 1st and 2nd Law)

Front

What is weight?

Back

Weight is the force of gravity on an object.

Front

Fill in the blank: Balanced forces do not change the object's speed or ____________

Back

direction.

Front

What law explains why a magician can pull a tablecloth out from under dishes without disturbing them?

Back

Newton's 1st Law.

Front

What is the net force if there are 4000 N to the left and 1000 N to the right?

Back

4000 N left.

Front

What is friction?

Back

Friction is a force that opposes motion.

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

What does Newton's 2nd Law describe?

Back

Newton's 2nd Law describes the relationship between force, mass, and acceleration (F=ma).

Front

What is an example of balanced forces?

Back

A book resting on a table is an example of balanced forces.

Front

What happens to an object when unbalanced forces act on it?

Back

The object will accelerate in the direction of the net force.

Front

What is the unit of force?

Back

The unit of force is the Newton (N).