Hi friends,(adsbygoogle = window.adsbygoogle || []).push({});

Here is a typical problem

https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-ash4/432331_2639240957573_1038427614_n.jpg

It is an elastic collision. Here I am applying simply the conservation of linear momentum as,

Momentum before collision = Momentum after collision

i.e.

Total translational K.E. of the block will be transferred to the disk. Hence disc's COM will have velocity v after collision. and hence the angular velocity be ω = v/r.

But this is not the correct answer. The correct answer is option (b).

Please friends help me in this problem.

Thank you all in advance.

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# Homework Help: Rotational Mechanics Problem typical one

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