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A man of mass 50 kg runs up a flight of stairs having a rise of 5m in 4s (A) what is the work by the man (B) what is the average power developed by the man

Posted by Ashvini Patidar 3 years, 10 months ago

CBSE > Class 09 > Science

2 answers

Yogita Ingle 3 years, 10 months ago

g=10 m/s^2
m=50 kg
h=5m
t=4s
Then
W=mgh
=50×10×5
=2500 N
Now,
Average power=total work done / time
=2500/4
=625 J s^-1

2Thank You

Sai Vennela S 3 years, 10 months ago

Mass=50kg, Displacement, or height=5m, Time=4s (i) Work done=mgh =50*9.8*5m =2450J (ii) Work done=2450J and Time taken=4s POWER=W/t =2450/4 =612.5J/s

3Thank You

ANSWER

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