Question

find the power of an electric Proton if it lifts 200 kg of water in 5 minutes from a Wall of 120 metres depth​

Answer 1

power = W/t = mgh/t= 800 j/s

Answer 2

Answer:

P=0.7848 KW

Explanation:

Given that

Mass ,m= 200 kg

h= 120 m

We know that work against gravity = m g h

W= m g h

W= 200 x 120 x 9.81

W=235.44 KJ

We know that rate of work done is known as power.

So

$P=\dfrac{dW}{dt}$

Given that

t= 5 min = 5 x 60 = 300 s

So

P= W/t

P= 235.44 /300 KJ/s            ( We know that J/s = W)

P=0.7848 KW

So power requires is P=0.7848 KW