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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 :-
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g , g 3 - g, g
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g , g 3 3 -
g, g 3
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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 |
