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1. The pulley opposite has four pulleys which support the load by dividing it into four lengths. Each part of the rope equally supports the load. The mechanical advantage is 4. This means lifting a load with this arrangement of pulleys allows the lifting of 4 times a normal maximum load.

Each of the efforts (e1, e2, e3, e4) has to move in order for the load to move and calculating the velocity ration is seen below.

2. The example opposite shows a pulley system used to lift a 100N load. Work out the mechanical advantage and velocity ratio.

What effort is required to lift the 100N load?

How far does the load move in compared to the 4m movement of the final effort?