Question

write an expression for work done in raising the load of mass 'm' at height 'h'

Answer 1

given :

mass= m kg

height =h m

acceleration due to gravity=g m/s2

Acceleration due to gravity at height H IS GIVEN BY :

g¹=g(1-2h/R)

Answer 2

Ok so here the work done by gravity will be -mgh because the gravitational force is given by mg and displacement is h so work done will be force x displacement and as the direction of the gravitational force is downwards and the object is moving upwards thus the negative sign.

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Hope u understand..