Understanding Frictional Force

What is the definition of friction?

• Friction is the temperature increase caused by two surfaces rubbing together.

• Friction is the force that enhances the motion of two surfaces in contact.

• Friction is the force that opposes the relative motion of two surfaces in contact.

• Friction is the energy lost when two surfaces are in motion.

Name the three types of friction.

• Static friction, kinetic friction, rolling friction

• frictionless motion

• static resistance

• dynamic friction

What is static friction?

• Static friction is the force that prevents two surfaces from sliding past each other.

• Static friction is the force that only acts on moving objects.

• Static friction is the force that occurs when two surfaces are already in motion.

• Static friction is the force that allows two surfaces to slide past each other.

What is kinetic friction?

• Kinetic friction is the force that acts on stationary surfaces.

• Kinetic friction is the force that accelerates an object.

• Kinetic friction is the force opposing the motion of sliding surfaces.

• Kinetic friction is the force that increases with the speed of an object.

What is rolling friction?

• The force that prevents an object from sliding on a surface.

• The friction that occurs when two surfaces are in contact without movement.

• The resistance faced by an object when it is pushed across a surface.

• Rolling friction is the resistance encountered when an object rolls over a surface.

List one advantage of friction.

• Friction provides traction.

• Friction reduces speed.

• Friction causes objects to slide easily.

• Friction eliminates wear and tear.

How does friction help in walking?

• Friction reduces the speed of walking.

• Friction makes the ground slippery.

• Friction has no effect on walking.

• Friction helps in walking by providing grip and preventing slipping.

What is one disadvantage of friction?

• Friction can lead to wear and tear on materials.

• Friction increases the efficiency of machines.

• Friction is essential for generating electricity.

• Friction helps in reducing speed of objects.

How can friction cause wear and tear?

• Friction increases the strength of materials.

• Friction has no effect on surface integrity.

• Friction only affects liquids, not solids.

• Friction causes wear and tear by removing material from surfaces due to heat and mechanical interaction.

What is the role of friction in vehicle braking?

• Friction is essential for slowing down and stopping a vehicle by converting kinetic energy into heat through brake application.

• Friction only works in wet conditions.

• Friction has no effect on vehicle braking.

• Friction increases speed and prevents stopping.