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 unless acted upon by an unbalanced force.

Front

What is inertia?

Back

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

Front

Which has more inertia: a truck or a skateboard?

Back

A truck has more inertia because it has more mass.

Front

If an object is at rest, what will happen according to Newton's 1st Law?

Back

It will remain at rest unless acted upon by an unbalanced force.

Front

What happens to an object in motion according to Newton's 1st Law?

Back

It will continue to move in a straight line at constant speed unless acted upon by an unbalanced force.

Front

What is an unbalanced force?

Back

An unbalanced force is a force that causes an object to change its state of motion.

Front

If you push a tree with 20 N of force and it doesn't move, what is the force the tree exerts back on you?

Back

The tree exerts 20 N of force back on you.

Front

Why does a heavier object have more inertia?

Back

Because it has more mass, which means it requires more force to change its motion.

Front

What is the relationship between mass and inertia?

Back

The greater the mass of an object, the greater its inertia.

Front

Can an object be in motion and still have a net force of zero?

Back

Yes, if it is moving at a constant velocity, the net force acting on it is zero.