Pendulum A of length 𝑙1 = 2 m is released from an initial angle of 𝜃1 = 60°. The impact of pendulum bob

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Pendulum A of length 𝑙1 = 2 m is released from an initial angle
of 𝜃1 = 60°. The impact of pendulum bob A with that of B with
length 𝑙2 = 3 m, has a coefficient of restitution of 0.8, and
both bobs have identical mass 𝑚 = 2 kg. Find the maximum angle, 𝜃2,
attained by pendulum B.