Question

a man weighing 80 kg climbs a staircase carrying 20 kg load the staircase has 40 steps each of 25 cm height if he takes 20 second to climb the work done is

Answer 1

total mass is 100 kg.
and total distance covered by man is 40 *25/100=10m.
now work done =mgh
=100*10*10. (g=10)
10000.
if I am right then mark as brain liest

Answer 2

The work done by the man is 9800 Joules.

Explanation:

Given that,

Mass of the man is 80 kg and the mass of the load is 20 kg. He go 40 steps each of 25 cm height if he takes 20 second to climb. Work done by the man is given by :

$W=F\times d$

$W=mgh$

$W=(80+20)\times 9.8\times 0.25$

W = 245 Joules

For 40 steps, work done is equal to,

$W=245\times 40$

W = 9800 Joules

So, the work done by the man is 9800 Joules. Hence, this is the required solution.

Learn more,

Work done

https://brainly.in/question/1522585