Wires A and B are connected with blocks P and Q as shown. ratio of lengths, radii and Young's mo

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8.Mechanical Properties of Solids

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Wires $A$ and $B$ are connected with blocks $P$ and $Q$ as shown. The ratio of lengths, radii and Young's modulus of wires $A$ and $B$ are $r, 2r$ and $3r$ respectively ($r$ is a constant). Find the mass of block $P$ if ratio of increase in their corresponding lengths is $1/6r^2$. The mass of block $Q$ is $3M$.

A

$M$

B

$3M$

C

$6M$

D

$9M$

Solution

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Standard 11

Physics

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