Question

Physics numericals:-A pump is used to lift 100 kg of water from a well 60 m deep, in 20 s. If force of gravity on 1 kg is 10 N, find :i) work done by the pumpii) potential energy stored in the wateriii) power spent by the pumpiv) power rating of the pump. State the assumption if any.​Please anyone tell me the solution fast its very urgent

Answer 1

Answer:

1-4500,2-4500,3-225

Explanation:

we know that

work done = FS

so we need F

F=ma

we need acceleration

v=d/t=60/2=30

v²-u²=2as, 30²-0²=(2)(a)(s), a=7.5

F=100(7.5)=750

total workdone is 4,500j

we know that

change in potential energy= work done

U(I) - U(F) = FS

0 - U(F) = 4,500j

we know

p=w/t

p=4500/20=225watt