Question

1000 kg of water falls every second from a height of 120 m. The energy of
this falling water is used to generate electricity. Calculate the power of the
generator assuming no losses.
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Answer 1

Answer:

• The power of the generator = 1176 kilo-watt

Explanation:

Given :

• Water falls every second = m = 1000 kg
• Height = h = 120 m

We know that,

⠀⠀⠀⠀☆ E = mgh

⠀⠀⠀⠀⠀⠀⠀➦ (1000 × 120 × 9.8) j

⠀⠀⠀⠀⠀⠀⠀➦ 1176000 j ✧

Now,

• E = 1176000 j = 1176 kj
• t = 1 sec

⠀⠀⠀☆ P = E/t

⠀⠀⠀⠀⠀⠀➦ 1176/1

⠀⠀⠀⠀⠀⠀➦ 1176 kilo-watt ✧