Question

A child has to complete 3600J of work in half a minute to lift a heavy load. How much power does he spend?

Answer 1

Explanation:

power = work done /time taken

=3600/ 30

=120 watt

Answer 2

$\pink{\overbrace{\underbrace{\sf Solution}}:-}$

$\: \: \: \: \:$$\sf{Work \: (W) = 3600 \: J}$

$\: \: \: \: \: \: \: \: \:$$\sf{Time \: (t) = 30 \: second}$

$\sf{Now \: ,}$

$\: \: \: \: \: \:$$\large \bold{Power = \dfrac{Work}{time}}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$$\small \bold{P = \dfrac{W}{t}}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$$\sf{P = \dfrac{3600}{30}}$

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$$\sf\red{P = 120 \: Watt}$