A pulley system is marked with a Mechanical Advantage of 2.5. A worker applies 450 N to the pulley in an attempt to lift a sound system with a 1500 N weight. Of this task we could say that:
The mechanical advantage must be incorrect, as the mechanical advantage cannot have decimals
The work done by the worker will be lower than the work done by the pulley system while lifting the sound system
It is impossible to lift a sound system using a pulley lever, you must use a third-class lever