Just needed to be proofread (easy forumula)

[simplekin]

Homework Statement

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?

Homework Equations

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?

 

[G01]

Looks good to me!