Question

a slope of length 50m rises to height of 10m above the ground .An effort of 100N is needed to push a 250N object up the ramp.calculate a.AMA b.VR c.efficiency​

Answer 1

Answer:

Actual mechanical advantage = force out / force in

250 N / 100 N = 2.5     force out is 2.5 X force provided

250 N * 10 m = 2500 Joules         work output

100 N * 50 m = 5000 Joules        work input

Efficiency is 2500 / 5000 = 50 %

Not sure what is meant by VR