A solid cylinder of mass 2 kg and radius 0.2 mis rotating about its own axis without friction withangular velocity 3 rad/s. A particle of mass 0.5 kg moving with a velocity 5 m/s strikes the cylinder and sticks to it as shown in figure below. The angular momentum of the cylinder before collision will be
A
0.12 J-s
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B
12 J-s
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C
1.2 J-s
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D
1.1.2 J-s
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Solution
The correct option is A 0.12 J-s Angular momentum of the cylinder before collision L=Iω=12MR2ω=12(2)(0.2)2×3=0.12J−s.