Question

Two blocks A and B of masses 3 m and m
Two
respectively are connected by a massless and
inextensible string. The whole system is suspended
by a massless spring as shown in figure. The
magnitudes of acceleration of A and B immediately
after the string is cut, are respectively :-
W0000000
A 3m
B
m
(1)
colca
9
(2) g.
gg
(3)
3'3
(4) g
g
3
221​

Answer 1

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From the free body diagram or FBD of the given system we get,

3mg - T = 3ma    ---------(1)

T - 2mg = 2ma    ---------(2)

Adding (1) and (2),

3mg - T + T - 2mg = 3ma + 2ma

mg = 5ma

a = mg/5m

a = g/5

Therefore, acceleration of the masses is g/5

┏_________∞◆∞_________┓

     ✭Hòpè Ìt Hèĺp§✭  

┗________∞◆∞_________┛