Question

what is friction ? How it is work ?​

Answer 1

Answer:

the rubbing of one surface or thing against another is called friction.

Anytime two objects rub against each other, they cause friction.

When one object is sliding on another it starts to slow down due to friction.

Answer 2

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$\huge{ \boxed { \boxed { \underline{ \bf \purple {\mathbb {ANSWER}}}}}}]$

${ \underline{ \bf \pink{Friction}}}$

• Friction is defined as the tangential force acting between the contact of two surfaces and opposes relative motion.

• Friction is measured in Newtons.

${ \underline{ \bf \red{Mathematically,}}}$

f ~ n

➡️ f = mu N

Friction can be imagined like as interaction of molecules by the action of adhesive and cohesive forces between the two surfaces which subsequently break and then new bonds are formed as the objects start to experience motion.

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${ \underline{ \bf \blue{Consider\: an\: object\: at \:rest}}}$

• The body experiences Static friction.

imagine an external force is applied on the object which cancels out the friction.

• The object experiences Limiting Friction and has impending motion

Finally the external force applied is greater than of friction.

• The object experiences Kinetic Friction and moves with an acceleration in direction of the external force

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