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

Answer:

lifting

Explanation:80+20=100

40x25= 1000 he is fast

he took  1/2sec for each step

Answer 2

Answer:

Explanation:a man is climbing who's weight is 80+with a mass20 kg with him.

So ,

Total mass is 100kg

So, 40 steps ×25 cm =1000 cm=10m

W=mgh

100×9.8×10=9800J