Question

a load of 400 Newton is lifted by a first class lever in which the load is at the distance of 20 cm and the effort is at the distance of 60 cm from the fulcrum if 150 Newton effort is required to lift the load what is its efficiency ?​

Answer 1

Answer:

1. solution,
2. Given
3. load =400N
4. ld=0.2m
5. ed=0.6m
6. effort =150N

Explanation:

efficiency =output work/input work ×100%

l×ld/e×ed×100%

400×0.2/150×0.6×100%

80/90×100%

88.89%ans