1. The problem statement, all variables and given/known data A screw pump is turned with a force of 125N. The handle traces a circle with a DIAMETER of 30cm, and is turned 45 times. The pump lifts 130 litres of water 2m high. (1 litre of water = 1kg aka 10N) What is the work output? What is the work input? What is the efficiency of the pump? 2. Relevant equations 3. The attempt at a solution For work output, i did: 130 times 10 = 1300N times 2M = 2600J Work output: 2600J For work input, i did Pi times .30m = .94m times 45 = 42.4M times 125N = 5300J Work input: 5300J Effiiciency: 2600J divided by 5300J = 49% Is this correct?