Physics Two Dimensional Motion Question 257
Question: Two particles of equal masses are revolving in circular paths of radii $ r _{1} $ and $ r _{2} $ respectively with the same speed. The ratio of their centripetal forces is
[NCERT 1984]
Options:
A) $ \frac{r _{2}}{r _{1}} $ B) $ \sqrt{\frac{r _{2}}{r _{1}}} $ C) $ {{( \frac{r _{1}}{r _{2}} )}^{2}} $ D) $ {{( \frac{r _{2}}{r _{1}} )}^{2}} $
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Answer:
Correct Answer: A
Solution:
$ F=\frac{mv^{2}}{r}. $ If m and v are constants then $ F\propto \frac{1}{r} $ \ $ \frac{F _{1}}{F _{2}}=( \frac{r _{2}}{r _{1}} ) $
BETA
