Two blocks A and B of same mass m connected by a light spring are suspended by an inextensible string as shown in the figure. Find the magnitude of the acceleration of block A and B just after the string is cut.
A
2g,0
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
0,2g
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
g,g
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
2g,2g
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is A2g,0 When block A and B are in equilibrium position, let To be the spring force and T be the tension in the string. F.B.D of ′B′
To=mg(1) F.B.D of ′A′
T=mg+T0 T=2mg(2) When string is cut, tension T becomes zero. but spring does not change its shape just after cutting . So spring force acts on mass B. F.B.D of 'B'