Two balls of mass m 1 = 100 gm and m 2 = 300 gm are suspended from point A by two equal inextensible threads, each of length 𝓁 = 
m. Ball of mass m 1 is drawn aside and held at the same level as A but a distance 
𝓁 from A as shown. When ball m 1 is released, it collides elastically with stationary ball m 2 . Then velocity in m/s with which the ball m 1 collides with the ball m 2 is
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(4)
Sol. When string become taut
sin θ = 
⇒ θ = 60º and
u = 
= 
∴ 
m 1 u 1 2 = 
m 1 ( 
sin θ ) 2 + m 1 g λ (1–cos θ )
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