Question

Define Friction........​

Answer 1

• Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.

Answer 2

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▶Friction:- It is a force which oppose the motion or oppose the intension of motion.

• Friction is occurs at the point of contact.
• Friction is occur between the two surfaces.
• Friction adjust its value automatically and always oppose motion and intension of motion.

Static Friction :−

• When two objects having more relative motion between two bodies in contact is called Static friction.

• Static friction doesn't exist by itself.

• Static friction help us to start the motion or move.

• For walking on ground or for starting a motion Static friction is necessary.

Limiting Friction :−

• It is the maximum opposing force that comes into play, when one body is just at the verge of moving over the surface of the other body.

• To start a object or for starting a motion minimum limiting friction value must be applied.

• The direction of force of limiting friction is always opposite to the direction in which body have intension to move.

Kinetic Friction :−

• It is the opposing force that comes into play when one body is actually moving over the surface of another body.

• Kinetic Friction help us to stop the motion.

• Kinetic Friction is always slightly less than the limiting friction.

• Kinetic Friction is also known as dynamic friction.