what is friction?How maby tyes of friction? explain
Answers
Answer:
Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction.
Explanation:
Static Friction
Static friction exists between a stationary object and the surface on which it is resting. It prevents an object from moving against the surface.
Sliding or Dynamic Friction
Sliding friction occurs between objects as they slide against each other.
When sliding friction is acting there must be another force existing to keep the body moving.
Rolling Friction
Rolling friction is the resistive force that slows down the motion of a rolling ball or wheel. It is also called rolling resistance.
Fluid Friction
Here on Earth we tend to take air resistance (aka.“drag”) for granted. We just assume that when we throw a ball, launch an aircraft, deorbit a spacecraft, or fire a bullet from a gun, that the act of it traveling through our atmosphere will naturally slow it down. But what is the reason for this? Just how is air able to slow an object down, whether it is in free-fall or in flight? air friction is experienced by the objects moving through the open air. air friction acts between the object and the air through which it is moving. It is also called drag. This force depends upon the object's shape, material, speed with which it is moving and the viscosity of the fluid. Viscosity is the measure of the resistance of the air to flow and it differs from one density another.