College

Assume your mass is 84 kg. The acceleration due to gravity is [tex]9.8 \, \text{m/s}^2[/tex]. How much work against gravity do you do when you climb a flight of stairs 3.9 m high?

Answer :

m, mass=84 kg
height, h=3.9m
gravity, g= 9.8m/s2
W = F . d
F=force
d=Displacement
W=work done by force
Now by putting the values
F= m g (Acting downward )
d= h (Upward)
W= m g h ( work done against the force)
W= 84•9.8•3.9J
W= 3210.48
Therefore the answer will be 3210.48J.

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