Question

A weighing 50 kg runs up a hill rising himself vertically 10m in 20s . calculate the power

Answer 1

ans. is 245 Watt .. solution is in the pic ..
hope it helps.... :)

Answer 2

Given:

• A man of 50 kg ran up a hill rising vertically 10m in 20s.

To find:

• Net power?

Calculation:

• Power is defined as the rate of doing work.

• In other words, it is the net work divided by the time taken.

• In this case, the work done will be equal to the gravitational potential energy attained by the particle with respect to the earth surface.

Let power be P :

$P=\dfrac{work}{time}$

$\implies P = \dfrac{m\times g\times h}{time}$

$\implies P =\dfrac{50\times 10\times 10}{20}$

$\implies P = 250 \:Watt$

So, the power output by man is 250 Watt.