-
Two blocks A and B of masses 3m and m 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 :-
-
-
g , g 3 - g, g
-
g , g 3 3 -
g, g 3
-
Correct Option: A
Before cutting the string
kx = T + 3 mg ...(i)
T = mg ...(ii)
⇒ kx = 4mg
After cutting the string T = 0
aA = | ||
3m |

aA = | ↑ | |
3 |
and aB = | = g ↓ | |
m |