Stan raises a 1110 N piano a distance of 5.00 m using a set of pulleys. Stan pulls in 20.0 m of rope.

and the question is? The work done is weight*height.

Mechanical advantage: 20/5

To find the mechanical advantage of the pulley system, we can use the formula:

Mechanical Advantage (MA) = output force / input force.

In this case, the output force is the weight of the piano being lifted, which is given as 1110 N. The input force is the force Stan applies to the rope.

To calculate the input force, we can use the following formula:

Input Force = Output Force / Mechanical Advantage.

Given that Stan pulls in 20.0 m of rope, we can calculate the mechanical advantage as follows:

Mechanical Advantage = 20.0 m / 5.00 m = 4.

Now we can calculate the input force:

Input Force = 1110 N / 4 = 277.5 N.

Therefore, Stan applies an input force of 277.5 N to lift the piano using the set of pulleys.