Newton's First Law

Front

What is Newton's First 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 a net external force.

Front

What is inertia?

Back

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

Front

What is net force?

Back

The net force is the vector sum of all the forces acting on an object.

Front

What is the unit of force?

Back

The unit of force is the Newton (N).

Front

What does it mean for forces to be balanced?

Back

Balanced forces are equal in size and opposite in direction, resulting in a net force of zero.

Front

What is gravitational force?

Back

Gravitational force is the attractive force between two masses, such as the Earth and the planets.

Front

How does mass affect inertia?

Back

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

Front

What is the relationship between mass and weight?

Back

Weight is the force of gravity acting on an object's mass, calculated as weight = mass × gravitational acceleration.

Front

What happens to an object in motion if no net force acts on it?

Back

It will continue to move at a constant velocity in a straight line.

Front

What is an example of an unbalanced force?

Back

A soccer ball being kicked is an example of an unbalanced force, as the kick changes its motion.