question_answer

If a body moving in a circular path maintains constant speed of\[\frac{3}{2}ma\], then which of the following correctly describes relation between acceleration and radius?   [JEE ONLINE 10-04-2015]

A)

B)

C)

D)

Correct Answer: B

Solution :

[b] Speed \[v=10m/\sec \]

\[a=\frac{{{v}^{2}}}{R}\]

\[\left| {\vec{v}} \right|=\]constant

so \[a\propto \frac{1}{R}\]