Friction

Front

What is friction?

Back

Friction is the resistance that one surface or object encounters when moving over another. It acts in the opposite direction to the motion.

Front

What factors affect the amount of friction between two surfaces?

Back

The amount of friction depends on the normal force pressing the two surfaces together and the nature of the surfaces in contact.

Front

What is the coefficient of static friction?

Back

The coefficient of static friction is a dimensionless value that represents the ratio of the maximum static friction force to the normal force. It is usually greater than the coefficient of kinetic friction.

Front

What is the coefficient of kinetic friction?

Back

The coefficient of kinetic friction is a dimensionless value that represents the ratio of the kinetic friction force to the normal force when two surfaces are sliding past each other.

Front

How does friction affect motion?

Back

Friction opposes the motion of objects, causing them to slow down or stop. It can also affect the acceleration of objects.

Front

What is inertia?

Back

Inertia is the property of an object to resist changes in its state of motion. It is directly related to the mass of the object.

Front

In which direction does friction act relative to the direction of motion?

Back

Friction acts in the opposite direction to the direction of motion.

Front

What is the normal force?

Back

The normal force is the force exerted by a surface that supports the weight of an object resting on it, acting perpendicular to the surface.

Front

How do you calculate the weight of an object?

Back

Weight is calculated using the formula: Weight (W) = mass (m) × gravitational acceleration (g). For Earth, g is approximately 9.81 m/s².

Front

What is the relationship between static and kinetic friction?

Back

Static friction is generally greater than kinetic friction for the same two materials in contact.