Question

Let U be the speed of particle of mass m just before impact, V be the speed of block x just after impact and J be the impulse set up in the string due to impact. Let all collisions be perfectly inelastic. Column-I shows various situations and Column-II shows the possible values of V and J, just after impact.

• A. a $\to$ p, q; b $\to$ r; c $\to$ q,; d $\to$ r
• B. a $\to$ p, q, t; b $\to$ r, s; c $\to$ p, q, t; d $\to$ r, s
• C. a $\to$ r, s, t; b $\to$ p, q, t; c $\to$ r, s; d $\to$ p, q, t
• D. a $\to$ r, s; b $\to$ r, s; c $\to$ p, q, t; d $\to$ p, q, t

Answer 1

The correct option is B a $\to$ p, q, t; b $\to$ r, s; c $\to$ p, q, t; d $\to$ r, s

For a and c For b and d
mU - J = 2mV mU = 2mV
$V=\frac{U}{3}$ $V=\frac{u}{2}$
J = mV J = 0