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Physics

Mechanics

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Question

$straight A space gramophone space record space has space radius space straight r space and space mass space straight M. space It space is space rotating space with space straight a space speed space omega italic. space Two space drops space of space wax space each space of space mass space straight m space fall space on space it space at space straight a space distance space straight r divided by 2 space on space opposite space sides. space The space new space velocity space is space$

$\frac{ω}{2}$
$\frac{M ω}{(M + m)}$
$\frac{m ω}{M + m}$
$\frac{(M - m) ω}{(M + m)}$

The correct answer is: $fraction numerator M omega over denominator left parenthesis M plus m right parenthesis end fraction$

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