Newton's 1st Law

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 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. The more mass an object has, the greater its inertia.

Front

If an object has twice the mass of another object, what can be said about its inertia?

Back

It has twice as much inertia.

Front

What is a net force?

Back

The net force is the vector sum of all the forces acting on an object. It determines the object's acceleration.

Front

What happens when forces are balanced?

Back

When forces are balanced, the net force is zero, and the object remains at rest or continues to move at a constant velocity.

Front

What happens when forces are unbalanced?

Back

When forces are unbalanced, the object will accelerate in the direction of the larger force.

Front

What kind of objects have inertia?

Back

All objects with mass have inertia, regardless of whether they are at rest or in motion.

Front

What is an example of an unbalanced force?

Back

A soccer ball being kicked is an example of an unbalanced force, as the force of the kick causes it to accelerate.

Front

What is an example of balanced forces?

Back

A book resting on a table experiences balanced forces: the force of gravity pulling it down and the normal force from the table pushing it up.

Front

How does mass affect inertia?

Back

The greater the mass of an object, the greater its inertia, meaning it will be harder to change its state of motion.