Friction and Force Basics

Front

What is friction?

Back

Friction is a force that opposes the motion of an object when it comes into contact with another surface.

Front

How can friction be reduced?

Back

Friction can be reduced by: 1) Reducing the force acting between the two surfaces, 2) Reducing the roughness of the surfaces, 3) Using lubricants like wax, grease, or oil.

Front

What is an example of friction that is helpful?

Back

Helpful examples of friction include: 1) Brakes used on a bike, 2) Tires from a car on the road, 3) Tread on the bottom of shoes.

Front

What happens if the net force acting on an object is zero?

Back

If the net force is zero, the forces acting on the object are balanced, meaning the object will remain at rest or continue moving at a constant velocity.

Front

What is defined as a push or pull?

Back

A force is defined as a push or pull acting on an object.

Front

What is net force?

Back

Net force is the overall force acting on an object when all the individual forces are combined. It determines the object's acceleration.

Front

What is the unit of force?

Back

The unit of force is the Newton (N).

Front

What is static friction?

Back

Static friction is the frictional force that prevents two surfaces from sliding past each other when at rest.

Front

What is kinetic friction?

Back

Kinetic friction is the frictional force that opposes the motion of two surfaces sliding past each other.

Front

What factors affect friction?

Back

Friction is affected by: 1) The nature of the surfaces in contact (roughness), 2) The normal force (the weight of the object), 3) The presence of lubricants.