Question

water is lifted from a well of dept 50m. if mass of water is 20kg and that of the rope is 0.2kg per metre the amount of work done is

Answer 1

Answer:

the final required answer is 12250j

Answer 2

Answer:

Amount of workdone is 12250 jule.

Step-by-step explanation:

Given,

Mass of water, M= 20 kg

And mass of rope per metre,m= 0.2 kg

Water is lifted from a well,l = 50 m

Let work done be w

We know,

$w = Mgl + mg \times \frac{l}{2}$

Here g is gravitational force

$w = 20 \times 9.8 \times 50 + 10 \times 9.8 \times 25$

$w = 20 \times \frac{98}{10} \times 50 \ + 10 \times \frac{98}{10} \times 25$

$w = 20 \times 98 \times 5 + 98 \times 25$

$w = 9800 + 2450$

$w = 12250 \: jule$

Amount of workdone is 12250 jule.