A puppy tugs with a force of 45N to pull a rope on a pulley. This lifts his 90N bag of dog food. What is the mechanical advantage of the pulley
The mechanical advantage of a pulley system is equal to the number of ropes supporting the load. In this case, since the puppy is pulling the rope and lifting the bag of dog food, there is only one rope supporting the load.
Therefore, the mechanical advantage of the pulley system is 1.