Q8 of 38 Page 57

Particles of masses 2M, m and M are respectively at points A, B and C with AB = 1/2 (BC). m is much - much smaller than M and at time t = 0, they are all at rest (Fig. 8.1). At subsequent times before any collision takes place:


We know that gravitational force between two masses separated by a distance r is given by



Now,


Force due to 2M at A on B =


towards A


Force due to M at C on B =


towards C


Therefore, net force on B




Towards A


Therefore, m will move towards A


Therefore (c) is the correct option

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