Question

What is the efficiency of a simple machine which has velocity ratio 4 and mechanical
advantage 3? What effort is necessary to lift 30 newton in the machine? [Ars: 75%,20N)
hometerlonglevertolomenon efforts that​

Answer 1

Explanation:

Mechanical advantage is defined as the ratio of resistance overcomes to the effort applied. Velocity ratio of simple machine is the ratio of distance travelled by effort to the distance travelled by load in the machine.

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Answer 2

This is the answer . Hope it helps .