A long block A is at rest on a smooth horizontal surface. A small block B (whose mass is half of A) is placed on A at one end and projected along A with a velocity v. The coefficient of friction is μ μ .
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(a, b, c)
since F ext of A + B system is zero. Therefore, momentum of A + B system is conserved.
mu = (m – 2m) v or v = u/3.
Work done against friction = Loss is KE = 1/2 mu 2 = 1/2 (2m) (u/3) 2 = 
.
Force of friction between the blocks = μ μ mg.
Acceleration of A (towards right) = 
Acceleration of B (towards right) = 
μ μ g.
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