Physics, asked by zuberking, 3 months ago

A student lift water from well 25m deep. If the work done by the student is 500J, then find the volume of

water? (Take g = 10 m/s2

, Density of water = 1000 kg/m3)​

Answers

Answered by nirman95
3

Given:

A student lift water from well 25m deep. If the work done by the student is 500J.

To find:

Volume of water ?

Calculation:

We are assuming the gravitational acceleration to be constant at all depths and equal to 10 m/s².

Now, let mass of water be 'm':

So, the work done will be equal to potential energy attained by water.

 \therefore \: work =PE

 \implies \: work = m \times g \times h

 \implies \: 500 = m \times 10 \times 25

 \implies \: 500 = m \times 250

 \implies \: m = 2 \: kg

Let volume of water be V:

 \therefore \: V =  \dfrac{mass}{ \rho}

 \implies \: V =  \dfrac{2}{1000}

 \implies \: V =  2 \times  {10}^{ - 3}  \:  {m}^{3}

 \implies \: V =  2 \times  {10}^{ - 3}    \times 1000 \: litre

 \implies \: V =  2  \: litre

So, volume of water is 2 litres.

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