Question

ramesh applied a force of 6 kgf to draw a 4.8kg bucket of water from a well using a single fixed pulley . calculate the efficiency

Answer 1

Answer:

6-4.8= 1.2

Explanation:

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Answer 2

Answer:

Efficiency is 4/5.

Explanation:

Given:

Force= 6Kgf

mass of bucket= 4.8 Kg

We will consider acceleration due to gravity as 10 m/s²,

Load= 4.8 x 10 = 48N

Effort= 6 x 10 = 60N

Efficiency= $\frac{Mechanical advantage }{ velocity ratio }$

First we have to find mechanical advantage,

Mechanical advantage= 48/60= 0.8 or 4/5

For fixed single pulley, velocity ratio is 1

Efficiency= 4/5

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