T3.4 Friction and Gravitational forces CP

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

What are the types of friction?

Back

The main types of friction are static friction, sliding (kinetic) friction, rolling friction, and fluid friction.

Front

What is static friction?

Back

Static friction is the force that keeps an object at rest and prevents it from starting to move.

Front

What is sliding (kinetic) friction?

Back

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

Front

What is rolling friction?

Back

Rolling friction is the force that opposes the motion of a rolling object, such as a wheel or ball.

Front

What is fluid friction?

Back

Fluid friction is the resistance encountered by an object moving through a fluid (liquid or gas).

Front

What is gravitational force?

Back

Gravitational force is the attractive force between two masses, such as the Earth and an object.

Front

What is terminal velocity?

Back

Terminal velocity is the constant speed reached by an object when the force of gravity is balanced by the force of air resistance.

Front

What happens to a skydiver at terminal velocity?

Back

At terminal velocity, the forces acting on a skydiver are balanced, meaning the downward force of gravity equals the upward force of air resistance.

Front

What factors affect friction?

Back

Friction is affected by the types of surfaces in contact and the normal force (how hard the surfaces are pushed together).