Topic 1 and 2 review

Front

What is Newton's Second Law of Motion?

Back

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. (F = ma)

Front

What does it mean when we say 'for every action, there is an equal and opposite reaction'?

Back

This means that for every force exerted, there is a force of equal strength but in the opposite direction.

Front

What is the relationship between force, mass, and acceleration?

Back

Force equals mass times acceleration (F = ma). This means that the greater the mass of an object, the more force is needed to accelerate it.

Front

What happens to the force exerted by the ground when you apply more force to it?

Back

The force exerted by the ground increases.

Front

What is an example of Newton's Third Law in action?

Back

When a swimmer pushes down on the water, the water pushes back up on the swimmer.

Front

What is inertia?

Back

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

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 net force?

Back

The net force is the total force acting on an object after all the forces are combined.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is an example of a reaction force?

Back

When a bird flaps its wings down, the reaction force is the air pushing up against the wings.