Q: If W1 , W2 and W3 represent the work done In moving a particle from A to B along three different paths 1 , 2 and 3 respectively(as shown) in the gravitational field of a point mass m. Find the correct relation between W1 , W2 and W3
(a) W1 > W2 > W3
(b) W1 = W2 = W3
(c) W1 < W2 < W3
(d) W2 > W1 > W3
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Ans: (b)
Sol: Gravitational field is a conservative force field . In a conservative force field work done is independent of path .
Hence , W1 = W2 = W3