A simple pendulum, made of a string of length l and a bob of mass m, is released from a small angle 
. It strikes a block of mass M, kept on a horizontal surface at its lowest point of oscillations, elastically. It bounces back and goes up to an angle 
. The M is given by:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
JEE Main 2019
Velocity before collision 
Velocity after collision
Using momentum conservation
And 
… (i)
… (ii)
Dividing (ii) by (i), we get
By component and dividend rule
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