Forces & Law of Inertia

Front

What is the net force?

Back

The net force is the overall force acting on an object when all the individual forces are combined. If the forces are balanced, the net force is 0 N.

Front

What are balanced forces?

Back

Balanced forces are forces that are equal in size but opposite in direction, resulting in no change in motion.

Front

What are unbalanced forces?

Back

Unbalanced forces are forces that are not equal and opposite, causing a change in the motion of an object.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. It depends on the mass of the object.

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 motion.

Front

What is the role of an airbag in a car?

Back

An airbag reduces the effect of inertia during a collision by providing a cushion that slows down the occupant's motion.

Front

What happens to an object at rest when no net force acts on it?

Back

An object at rest will remain at rest if no net force acts on it, according to Newton's first law of motion.

Front

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

Back

An object in motion will continue to move at a constant velocity if no net force acts on it, according to Newton's first law of motion.

Front

What is Newton's first law of motion?

Back

Newton's first law states that an object at rest stays at rest, and an object in motion stays in motion at a constant velocity unless acted upon by a net external force.

Front

What is a crumple zone in a vehicle?

Back

A crumple zone is a designated area of a vehicle that is designed to deform and absorb energy during a collision, reducing the force transmitted to occupants.