A pulley system is marked with a Mechanical Advantage of 2.5. A worker applies 450N to the pulley in an attempt to lift a sound system with a 1500N weight. Of this task we could say that:

Question

A. the work done by the worker will be lower than the work done by the pulley system while lifting the sound system.
B. The mechanical advantage must be incorrect, as the mechanical advantage can not have decimals.
C. It is impossible to lift that much weight with this system so no movement should be observed.
D. It is impossible to lift the sound system using a pulley system, you must use a third-class lever.

Answer 1

A. the work done by the worker will be lower than the work done by the pulley system while lifting the sound system.