Contact forces

Front

What is friction?

Back

Friction is a force that always acts in the direction opposite of motion, resisting the movement of objects.

Front

What force causes a baseball to fly away from the batter when struck?

Back

The applied force from the bat causes the baseball to fly away from the batter.

Front

What is normal force?

Back

Normal force is the support force exerted upon an object that is in contact with a stable surface, acting perpendicular to that surface.

Front

What are the three main contact forces?

Back

The three main contact forces are applied force, normal force, and friction.

Front

How does applied force differ from friction?

Back

Applied force is the force exerted on an object to move it, while friction is the force that opposes the motion of the object.

Front

What direction does normal force act?

Back

Normal force acts perpendicular to the surface supporting an object.

Front

Can friction be both helpful and harmful?

Back

Yes, friction can be helpful (e.g., providing grip) or harmful (e.g., causing wear and tear on surfaces).

Front

What happens to an object when the applied force is greater than friction?

Back

The object will accelerate in the direction of the applied force.

Front

What is an example of applied force in everyday life?

Back

Pushing a shopping cart is an example of applied force.

Front

What role does gravity play in contact forces?

Back

Gravity pulls objects toward the Earth, affecting the normal force and friction experienced by the object.