Rotational Motion Question 168

Question: In a bicycle, the radius of rear wheel is twice the radius of front wheel. It $r _{f}$ and $r _{r}$ are the radii and $v _{f}$ and $v _{r}$ are the speeds of topmost points of wheels then

Options:

A) $v _{r}=2v _{f}$

B) $v _{f}=2v _{r}$

C) $v _{f}=v _{r}$

D) $v _{f}=4v _{r}$

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Answer:

Correct Answer: C

Solution:

[c] The velocity of top point of the wheel is twice that of centre of mass.

And the speed of centre of mass is same for both the wheels,

$v=\omega r$



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