11th grade
posted by pranshu .
a man whose mass is 75 kg walks up to 10 steps, each 20 cm high, in 5sec .what is the work done?

11th grade 
SraJMcGin
Please select the correct School Subject so a teacher of that subject will read and answer your post.
Sra 
physics 
drwls
The work done does not depend upon how long it takes. (But the POWER does). Work is the product of mass, the acceleration of gravity, and the elevation gain.
In your case, that is
W = M g H = 75 kg*9.8 m/s^2*2.0 m
= 1470 Joules
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