Inertia: Newtons first Law

Front

What is inertia?

Back

Objects not changing motion unless acted on by an unbalanced force.

Front

How can a ball sitting still on a plate start moving?

Back

A new, unbalanced force acts on the ball.

Front

What is the force that opposes motion between any surfaces that are touching?

Back

Friction.

Front

What happens to people in a car that runs into a wall?

Back

They will keep moving forward until they hit their seatbelt or the dashboard.

Front

What must be true about the forces on a car moving at a constant speed without changing direction?

Back

The forces on the car are balanced.

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 unless acted upon by an unbalanced force.

Front

What is an unbalanced force?

Back

A force that causes an object to change its state of motion.

Front

What is an example of inertia in everyday life?

Back

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

Front

How does friction affect motion?

Back

Friction opposes the motion of objects, slowing them down or stopping them.

Front

What is the relationship between mass and inertia?

Back

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