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Motion — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceMotion1 Mark
MCQ
Particles $P$ and $Q$ are undergoing uniform horizontal circular motions along concentric circles of different radii in clockwise sense $P $completes each round in $2\ min$ while $Q$ does it is 5min time required by $Q$ to make one revolution around $P$ is.
  • ✓
    $3min.$
  • B
    $10min.$
  • C
    $\frac{10}{3}\text{min}$
  • D
    This is not possible as $Q$ is moving slower than $P.$
✓

Answer

Correct option: A.
$3min.$

Time required by $Q$ to move around $P$
$=$ Time taken by $Q$ for for one complete round - Time taken by $P$ for one complete round
$= 5min - 2min$
$= 3min.$

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