Answer :
According to the solving the work done by the boy against the force of gravity is mgh.
What does gravity mean in modern terms?
The curvature of space and time caused by huge objects is what causes gravity, which is essentially geometry. The degree to which a coordinate within space-time is invisibly bent determines the strength of something like the gravitational "field" at any given place in time or space. Massive items slide down these curves in the direction of one another.
Is the force of gravity real?
Yes, there is gravity, but not in the way you might think of it. In other words, gravity does not interact directly, typically, or at a distance between two objects. However, gravity is a force in a more general sense since it symbolizes the interaction that takes place when two masses are close to one another.
According to the given data:
The mass of the boy, m
The height of the stair, h
We know that :
F = mg
The displacement in the upward direction
S = -h
The work done by the force of gravity on boy.
W = Fs
= mg(-h)
= -mgh
According to the solving the work done by the boy against the force of gravity is mgh.
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