10.3 Newton's First and Second Laws of Motion

Front

What is Newton's First Law of Motion?

Back

An object at rest will stay at rest, and an object in motion will stay in motion at a constant velocity unless acted upon by a net external force.

Front

What is Newton's Second 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. This is often expressed as F = ma.

Front

What is the formula to calculate force?

Back

Force (F) = mass (m) × acceleration (a).

Front

If a box is pushed with a force of 10N to the right and 8N to the left, what is the net force?

Back

2N to the right.

Front

What happens to an object at rest if no external forces are applied?

Back

It will stay at rest.

Front

What is the relationship between mass and force required to move an object?

Back

A greater force is required to move an object with a greater mass.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object, caused by a net force acting on it.

Front

What is inertia?

Back

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

Front

What is the unit of force in the International System of Units (SI)?

Back

The unit of force is the Newton (N).

Front

If a 0.2 kg golf ball accelerates at 20 m/s², what is the force applied?

Back

4 N.