help

Can you help me with this mechanics problem?

Note by Kyle Finch
6 years, 1 month ago

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Comments

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@Raghav Vaidyanathan the problem is in the middle.

- 6 years, 1 month ago

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I have rotated the image. $\huge\ddot\smile$

- 6 years, 1 month ago

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U can tell me the solution . ???

- 6 years, 1 month ago

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A disc has an angular velocity?

- 6 years, 1 month ago

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$\text{angular velocity}=\dfrac{\text{Relative velocity perpendicular to line joining them}}{\text{Distance between them}}$

By simple geometry, $\angle AOP=30^\circ$

Case I: $A$ is fixed to ground, so, the velocity of $P$ will be $\omega R$ at angle $120^\circ$ to the line joining $AP$, thus, $\omega_1=\dfrac{\omega R\cos 30^\circ}{\sqrt{3}R}$

Case II: $A$ is fixed to disc, in this case, velocity of $A$ will add up in relative velocity. In this case also, velocity of $A$ will be $\omega R$ at angle $60^\circ$ to the line joining $AP$. Thus, $\omega_2=\dfrac{\omega R\cos 30^\circ+\omega R\cos 30^\circ}{\sqrt{3}R}=2\omega_1\Rightarrow \dfrac{\omega_1}{\omega_2}=\dfrac{1}{2}$

- 6 years, 1 month ago

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Well indeed very nice by the way how was ur mains exam

- 6 years, 1 month ago

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Not too good. Getting just 275.

- 6 years, 1 month ago

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Was the physics section tough??

- 6 years, 1 month ago

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It was NCERTish. I must not blame questions for my marks. I don't like EM.

- 6 years, 1 month ago

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So who among all of you is supposed to get the highest.

- 6 years, 1 month ago

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Ronak Agrawal (on Brilliant)

- 6 years, 1 month ago

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Ok just one last query what makes a problem popular on brilliant. Can u tell ronaks score

- 6 years, 1 month ago

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He's getting like 315-320. The quality of problem makes it popular!

- 6 years, 1 month ago

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Bhavya Is getting 322.I guess??

- 6 years, 1 month ago

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Yes, he does

- 6 years, 1 month ago

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No i m asking do the staff member decide or the moderators

- 6 years, 1 month ago

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$\omega$

- 6 years, 1 month ago

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