Question

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

Answer 1

Explanation:

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.