What is sliding friction and how does it occur?

• Sliding friction is the resistance encountered when two surfaces slide against each other.

• Sliding friction is the same as static friction.

• Sliding friction occurs only in liquids.

• Sliding friction is the force that propels objects forward.

Name one application of sliding friction in everyday life.

• Sliding down a hill

• Using a skateboard

• Walking or running.

• Pushing a heavy object

How does sliding friction affect the motion of a car?

• Sliding friction increases speed, making it harder to stop.

• Sliding friction opposes motion, enabling control and stopping, but can cause skidding if too low.

• Sliding friction only occurs on wet surfaces.

• Sliding friction has no effect on a car's motion.

What role does sliding friction play in sports equipment?

• Sliding friction only affects the durability of sports equipment.

• Sliding friction reduces speed and agility in sports equipment.

• Sliding friction enhances control and performance while ensuring safety in sports equipment.

• Sliding friction has no impact on the performance of sports equipment.

Explain how sliding friction is important in machinery.

• Sliding friction is irrelevant to machinery performance.

• Sliding friction only affects the aesthetics of machinery.

• Sliding friction is important in machinery for controlled movement, stability, precision, and energy dissipation.

• Sliding friction increases wear and tear on machinery.

What materials are commonly used to reduce sliding friction?

• Wood shavings

• Rubber bands

• Lubricants (oils, greases), Teflon, graphite

• Sandpaper

How does the surface texture influence sliding friction?

• Surface texture influences sliding friction by affecting the interlocking of surfaces; rougher textures increase friction, while smoother textures decrease it.

• Surface texture has no effect on sliding friction.

• Smoother textures always increase friction.

• Rough textures decrease friction regardless of other factors.

Describe a scenario where sliding friction is beneficial.

• The movement of a car on a perfectly frictionless surface.

• The sliding of ice skates on ice.

• The smooth operation of a conveyor belt.

• The operation of brakes in vehicles.

What is the difference between static and sliding friction?

• Static friction acts only when an object is in motion.

• Sliding friction occurs only on rough surfaces.

• Static friction prevents motion; sliding friction opposes motion.

• Static friction is always greater than sliding friction.

How can understanding sliding friction improve safety in transportation?

• Sliding friction has no impact on vehicle safety.

• Increasing sliding friction can lead to more accidents.

• Understanding sliding friction is only relevant for sports equipment.

• Understanding sliding friction can improve safety in transportation by optimizing vehicle design and road conditions to reduce skidding and enhance control.