Day 130: JEE Mains Physics

1. A.
   $M_{1}/\left( M_{1} + M_{2} \right)$
2. B.
   $\frac{M_{2}}{M_{1}}$
3. C.
   $M_{2}/\left( M_{1} + M_{2} \right)$
4. D.
   $\frac{M_{1}}{M_{2}}$

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1. A.
   $r$
2. B.
   $\frac{1}{r^{2}}$
3. C.
   $\frac{1}{r^{3}}$
4. D.
   $\frac{1}{r}$

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1. A.
   2
2. B.
   6
3. C.
   4
4. D.
   8

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1. A.
   $6\sqrt{5}{\text{ }ms}^{- 1}$
2. B.
   $5\sqrt{6}{\text{ }ms}^{- 1}$
3. C.
   $5\sqrt{5}{\text{ }ms}^{- 1}$
4. D.
   $2\sqrt{5}{\text{ }ms}^{- 1}$

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