1. When an object is raised to a certain height against the gravitational field, gravitational work is done on the object.
2. For example, if an object of mass ‘m’ is raised through a height ‘h’ against acceleration due to gravity ‘g’ , then the gravitational work carried out is ‘mgh’.
w = m.g.h
w = Kg .ms-2.m
w = Kg m2 s-2
w = Joule
