Friction

Front

What is friction?

Back

Friction is the resistance that one surface or object encounters when moving over another. It is a force that opposes motion.

Front

What are the two main types of friction?

Back

The two main types of friction are static friction (the friction that prevents motion) and kinetic friction (the friction that occurs when objects are in motion).

Front

How does surface roughness affect friction?

Back

Rougher surfaces have greater friction because they have more irregularities that interlock and resist motion.

Front

What is the role of friction in everyday life?

Back

Friction is essential for many everyday activities, such as walking, driving, and holding objects, as it provides the necessary grip.

Front

What happens to an object in motion if there is no friction?

Back

Without friction, an object in motion would continue to move indefinitely in a straight line at a constant speed.

Front

How can friction be increased?

Back

Friction can be increased by increasing the weight of the objects in contact or by using materials with higher coefficients of friction.

Front

What is the coefficient of friction?

Back

The coefficient of friction is a numerical value that represents the amount of frictional force between two surfaces in contact, relative to the normal force.

Front

What is an example of friction being helpful?

Back

An example of friction being helpful is when brakes are applied in a car, allowing it to stop safely.

Front

What is an example of friction being harmful?

Back

An example of friction being harmful is when excessive friction causes wear and tear on mechanical parts, leading to failure.

Front

How can friction be reduced?

Back

Friction can be reduced by using lubricants, smoothing surfaces, or using ball bearings.