Question

A system of levers with the velocity ratio of 20 overcomes a resistance of 7400N when an effort of 370N is applied on it. Calculate (i) MA (ii) Efficiency of the machine

Answer 1

Given :-

A system of levers with the velocity ratio of 20 overcomes a resistance of 7400N when an effort of 370N is applied on it.

To Find :-

MA

Efficiency of the machine

Solution :-

MA is the abberiviation of Mechanical advantage

Mechanical Advantage = Load of body/Effort of the body

Mechanical Advantage = 7400/370

Mechanical Advantage = 740/37

Mechanical Advantage = 20/1

Mechanical Advantage = 20

Now

Efficiency = (Mechanical Advantage/Velocity) × 100

Efficiency = (20/20) × 100

Efficiency = 1 × 100

Efficiency = 100

Hence

Mechanical advantage is 20

Efficieny is 100%

Answer 2

Answer:

Refer to above attachment

Explanation:

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