[" 27.The work done by an external agent to shift a point "],[" mass from infinity to the centre of earth is "],[[" a."=0," b.">0," c."<0," d."<=0]]

The work done by an external agent to shift a point mass from infinity to the centre of the earth is W . Then choose the correct relation.

The gravitational field in a region is given by vecE=(10Nkg^-1)(veci+vecj) . Find the work done by an external agent to slowly shift a particle of mass 2 kg from the point (0,0) to a point (5m,4m)

The gravitational field in a region is given by vecE= - (10Nkg^-1)(veci+vecj) . Find the work done by an external agent to slowly shift a particle of mass 2 kg from the point (0,0) to a point (5m,4m)