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Most Important Selected Qs for JEE AdvancedPhysicsCenter of Mass, Momentum and Collision

Two identical spheres A & B of mass 50 kg and radius 1 m each lie on a smooth horizontal surface as shown in figure. The initial distance between their centres is 3 m . Starting from t =0 a constant force F =100 ~N acts on the sphere A towards right. The coefficient of restitution is e=0.5 . Find the time interval (in sec) between the first collision and the instant after which collision between both the spheres ceas

Correct answer

2

Step-by-step solution

T=2 [ 1 2 2 R F / m + 1 4 2 R (F / m) + 1 8 2 R (F / m) . . ]= 2 R (F / m) [+1+ 1 2 + 1 2^2 + 1 2^3 + . .+ . . ]

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