Newton's Laws of Motion

Front

What is motion defined as in physics?

Back

Motion is any change in position.

Front

What happens to an astronaut and a ball when the astronaut throws the ball in space?

Back

The ball moves, and so does the astronaut.

Front

What force is responsible for stopping a train that rolls to a stop without brakes?

Back

The opposing force of friction stopped the train.

Front

What determines which object orbits another in space?

Back

The object with the greater mass has a greater gravitational force and determines what satellites orbit around it.

Front

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

Back

When a person jumps horizontally off of an unanchored boat, the person goes forward and the boat goes backward.

Front

What are Newton's three laws of motion?

Back

1. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force. 2. The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. 3. For every action, there is an equal and opposite reaction.

Front

What is inertia?

Back

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

Front

How does mass affect gravitational force?

Back

The greater the mass of an object, the greater its gravitational force.

Front

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

Back

According to Newton's second law, force equals mass times acceleration (F = ma).

Front

What is an example of a contact force?

Back

Friction is an example of a contact force.