Forces and Motion Flashcard

Front

What is the net force when two equal forces of 400 N act on an object in the same direction?

Back

The net force is 800 N in the direction of the forces.

Front

What does Newton's 1st Law of Motion 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 is Newton's 2nd Law of Motion?

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

What are the two factors that affect the force of gravity between two objects?

Back

Mass and distance.

Front

What is friction?

Back

Friction is a force that opposes the motion of an object.

Front

How does a lubricant affect friction?

Back

A lubricant reduces friction.

Front

What is the formula for calculating force?

Back

Force = mass × acceleration (f=ma).

Front

What happens to the acceleration of an object if the mass increases while the force remains constant?

Back

The acceleration decreases.

Front

What is the effect of distance on the gravitational force between two objects?

Back

As the distance between two objects increases, the gravitational force decreases.