Friction, Gravity, and Newton's Laws (3.5+3.6)

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 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 is friction?

Back

A force that opposes the motion of an object, caused by the contact between two surfaces.

Front

How does friction affect motion?

Back

More friction decreases speed, while less friction increases speed.

Front

What is gravity?

Back

A force that attracts two bodies towards each other, proportional to their masses and inversely proportional to the square of the distance between them.

Front

What is the relationship between mass and weight?

Back

Weight is the force of gravity acting on an object's mass (Weight = mass × gravity).

Front

What is the SI unit of force?

Back

Newton (N).

Front

Why do objects weigh less on the Moon than on Earth?

Back

The Moon has less mass, and therefore less gravity compared to Earth.

Front

Why do objects weigh more on Jupiter than on Earth?

Back

Jupiter has more mass, and therefore more gravity compared to Earth.