A pulley is a simple machine that consists of a wheel with a groove running along its circumference between the rims of the wheel a rope or cable passes through the groove which is attached to the load on one end whereas effort is applied to perform work at the other end. Motorized pulley video the videos way was to connect the end of the string on the right side to the original motor so it reeled in the load from both ends making it level the second question wasnt asking which pulley has mechanical advantage but rather what the mechanical advantage was in terms of numbers the simple machines video . The pulley a pulley is a wheel that carries a flexible rope cord cable chain or belt on its rim pulleys are used singly or in combination to transmit energy and motion pulleys with grooved rims are called sheaves. A pulley is a wheel that you loop a rope over the key scientific concept for pulleys is that they redirect force for example instead of pushing a load up you can attach it to a rope and pulley above you and pull down to move it up all pulley systems re direct force
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