Newton's First Law of Motion

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 an unbalanced force.

Front

What is inertia?

Back

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

Front

Why does an 18-wheeler truck have more inertia than a bicycle?

Back

Because it has more mass.

Front

What type of forces cause a change in an object's motion?

Back

Unbalanced forces.

Front

If one object has twice as much mass as another object, what else does it have twice as much of?

Back

Inertia.

Front

What is the relationship between mass and inertia?

Back

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

Front

What happens to an object in motion if no unbalanced forces act on it?

Back

It continues to move at a constant velocity.

Front

What is an example of inertia in everyday life?

Back

A passenger lurching forward in a car when it suddenly stops.

Front

What is the effect of balanced forces on an object?

Back

Balanced forces do not change the object's motion.

Front

What is an example of unbalanced forces?

Back

A soccer ball being kicked.