1.

If W_(1), W_(2) and W_(3) represent the work done in moving a particle from A to B along three different paths 1, 2 and 3 respectively(as shown) in a gravitational field of point mass m, then

Answer»

`W_(1)=W_(2)=W_(3)`
`W_(1) gt W_(2) gt W_(3)`
`W_(11) LT W_(2) lt W_(3)`
`W_(1) lt W_(3) lt W_(2)`

Solution :ENERGY required = Increase in Gravitational POTENTIAL energy
`= -(GMM)/(3R)+(GMm)/(2R)=(GMm)/(6R)`
CORRECT choice is (d).


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