Question

List the advantages of friction.

Answer 1

You'll notice that your hands feel warm if you touch them together for a few seconds. Friction is the force that causes warming. Friction is created when two items, such as your hands, come into contact and move against each other. When you overcome the resistance of one thing rubbing against another, you get friction. Friction is a force that opposes the motion's direction. There is no friction caused when you simply put your hands together since there is no resistance. There's friction when you rub them together.

Complete step by step solution:
The advantages of friction:
Static Friction Prevents Slipping:
While an object rests against or meets a surface, such as when crossing the street or trekking a mountain trail, static friction occurs. Your feet would slide beneath you if there was no static friction as if you were walking on ice, which has little to no static friction. To keep you from falling, static friction applies a force to the soles of your shoes whenever they make contact with the ground.
Sliding Friction Stops a Car:
When a car's brakes are applied, sliding friction aids in stopping it. The brake or disc pad presses against the braking drum's interior or the rotor within the rolling wheel. The brake drum or rotor's surface slides against the brake disc or pad, creating a friction force that slows the vehicle down. The rubber brakes on a bicycle wheel resist sliding motion with the same force. Also, as you write, the friction between the tip of a pencil and the paper allows it to move over the surface, leaving pencil inscriptions known as writing.
Rolling Friction Keeps Vehicles Moving:
Rolling friction is a weaker friction force that occurs when something rolls across the top of something else, such as a wheel against a road or a ball bearing against the wheel bearing race. This force resists or pushes against the wheel or bearing when it rolls against a surface and is also known as rolling resistance or rolling drag. This force prevents the wheel or rollers from slipping on the road or during the race. This permits the roller balls inside a wheel bearing to rotate, allowing a car or bike's wheels to move.
Fluid Friction Makes Parachutes Float and Planes Fly:
Only non-solid objects, such as air, water, and gases, are affected by this force. Air, like all fluids, has a thickness or internal friction, which is referred to as viscosity. When the air stuck to a plane's wing scrapes against the air layers above it, fluid friction occurs, which helps the plane stay afloat. As a jumper glides to land, the same force works against the interior of a parachute to keep it floating.

Note: Friction-reducing techniques:
Soap your hands and rub them together as vigorously as possible. Because the soap creates a layer of smooth molecules between your fingertips, you won't get much heat. This effectively reduces the resistance between your hands, allowing them to glide past each other. For practical reasons, lubricants are frequently used to reduce friction. The oil in your car makes it easier for the metal engine parts to slide against one another. This keeps the engine from overheating and causing damage.