how is a pulley having newtons second law of motion ???
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A pulley is a wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable or belt, or transfer of power between the shaft and cable or belt. ... Pulleys are assembled to form a block and tackle in order to provide mechanical advantage to apply large forces.
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A Pulley or An Atwood machine is an arrangement of two objects of unequal masses. Both the objects ts are to be attached to the ends of the string. The string passes over a frictionless pulley, this arrangement is sometimes used to find the acceleration due to gravity. This is how they obey newtons second law of motion.
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