Answer / vijay

To give mechanical advantage and change direction of application of force.
Fixed Pulley, MA=1.
Variable Pulley, MA=2.

Answer / ashwani singh

transmission of power in rotary form

Answer / amrish

to transfer the force.

Answer / vishwajeet

it is used lift object with min effort against gravity

Answer / aamir pathan

PULLEY USED TO THOSE PLACE
WHERE POWER TRANSMIT TO LONG DISTANCE.
PULLEY MAIN PURPOSE IS TO TRANSMIT POWER FROM 1 PLACE TO
ANOTHER PLACE EASILY BY A ROTARY MOTION

Answer / nizam

pulley are used where the power transmit to the longer distance.
pulley are used when we use belt drive,rope drive.
also lifting of water from well.

Answer / darshan v.patel

for power transmit from driving shaft to driven shaft and increase speed of engine.

Answer / warrdogg

It's a device for mechanical leverage

Answer / sushant

pulley helps to reduce the weight of an object to be pulled
with the help of gravitational force

Answer / braj krishna

For power transmission & for idler

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