Question

write two benefit of friction

Answer 1

Transcript of Advantages and Disadvantages of Friction. The force offriction acts in the opposite direction that the object is moving, so frictionslows down the motion of moving objects. Friction also produces unnecessary heat. ... Brakes on a car use friction to stop the vehicles.

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Car

When you apply the brakes of a car, sliding friction helps to stop it. The brake or disc pad pushes against the inside of the brake drum or against the rotor inside the moving wheel. The surface of the drum or rotor slide against the brake disc or pad, which is a force of friction that slows the vehicle down. The same force applies to the rubber brakes against the sliding motion of a bicycle wheel. Also, the friction between the tip of a pencil allows it to move across the paper as you write, leaving pencil inscriptions known as writing.

Rolling Friction Keeps Vehicles Moving

Rolling friction represents a weaker friction force, which acts on items rolling across the top of something else, like a wheel against a roadway or a ball bearing against the wheel bearing race. Also called rolling resistance or rolling drag, this force resists or pushes against the wheel or bearing as it rolls against a surface. This force keeps the wheel or rollers from slipping against the roadway or race. This allows the roller balls inside a wheel bearing to turn and the wheels on a car or bike to move.

Fluid Friction Makes Parachutes Float and Planes Fly

This force applies only to non-solid objects such as air, water and gases. Like all fluids, air has a thickness to it or internal friction also called viscosity. Fluid friction occurs when the air stuck to the wing of a plane rubs against the air layers above it, which helps to keep the plane afloat. This same force works against the inside of a parachute to keep it afloat as a jumper glides to earth.

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Answer 2

Cross-fiber friction is friction that goes against the direction of the muscle fibers, it is used often in Sports Massage. The benefits of friction are to address a joint, to reduce swelling, to bring blood to the areas of dry, stringy muscles and to rub soreness away