An effort of 250N raises aload of 900N through 5M when using asimple machine.The effort moved through 25M.calculate the work input ofthe machine

Answer 1

250 N * 25 m = 6250 Joules work input

by the way
900 N *5 m = 4500 Joules work output
efficiency = 100 * output/input = 100 { 4500/6250} = 72% efficiency