a third class lever, 200g load is 6m from the pivot, and applied effort is 1m from the pivot,
The book asks CALCULATE THE VELOCITY RATIO FOR THIS SYSTEM. IF THE WORK PUT IN IS 3000J, CALCULATE THE USEFUL ENERGY OUT PUT.
1) load, 200 x 9.81 =1962n
2) effort to lift the load, load x distance from load to fulcrum / distance from fulcrum to effort. 1962 x 6 / 1 =11772n.
3) mecanical advantage or force ratio, load/effort. 1962/11772 =0.167 (0.17)
problems, velocity ratio= distance move by effort / distance move by load, trouble is there is no indication of any movement that i can see,
also if i use force ratio / efficiency x 100. no machines are ever 100%
should i have worked out a new applied effort from 3000j if so can somebody guide me on this,