8.6C Newton's Laws Review

Front

What is Newton's 1st Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Front

What is inertia?

Back

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

Front

What does Newton's 2nd Law of Motion state?

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 Newton's 3rd Law of Motion?

Back

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

Front

Give an example of Newton's 1st Law in everyday life.

Back

A magician pulling a tablecloth from under dishes without moving them demonstrates inertia.

Front

What happens to a coin when an index card is flicked away?

Back

The coin falls straight down due to gravity because it was at rest and tended to remain in the same location.

Front

How does mass affect inertia?

Back

The greater the mass of an object, the greater its inertia, meaning it will resist changes in its motion more.

Front

What is the role of unbalanced forces in motion?

Back

Unbalanced forces cause an object to change its state of motion, either accelerating or decelerating.

Front

What is an example of Newton's 2nd Law in action?

Back

Pushing a shopping cart: the harder you push (more force), the faster it accelerates.

Front

How does Newton's 3rd Law apply to walking?

Back

When you push down on the ground with your foot, the ground pushes you up with an equal and opposite force.