Question

The massless string connecting slider A and mass B passes over two small massless smooth pulley, one which is attached to 'A'. The end of strings are attached to mass B and roof as shown. Mass B has constant velocity V₀ directed downwards. At the instant when Y_A = b, the magnitude of acceleration of A is –

• A. $\frac { \mathrm { V } _ { 0 } ^ { 2 } } { \mathrm {~b} }$
• B.
• C.
• D. None

Answer 1

Answer: (C)

Answer 2

2V_A cos q = V₀ ̃ 2a_A cos q – 2V_A sin q $\frac { \mathrm { d } \theta } { \mathrm { dt } }$ = 0

Y_A = b cot q

̃ V_A = b cosec²q

\ a_A =