Speed or kinetic energy of a body falling towards the earth from a large height

1. A.
   $\sqrt{2GM\left(\frac{1}{R} - \frac{1}{R_0}\right)}$
2. B.
   $2GM\left(\frac{1}{R} - \frac{1}{R_0}\right)$
3. C.
   $\sqrt{GM\left(\frac{1}{R} - \frac{1}{R_0}\right)}$
4. D.
   $2\sqrt{GM\left(\frac{1}{R} - \frac{1}{R_0}\right)}$

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1. A.
   $\frac{2}{3}\frac{GMm}{R}$
2. B.
   $\frac{1}{3}\frac{GMm}{R}$
3. C.
   $\frac{1}{2}\frac{GMm}{R}$
4. D.
   $\frac{1}{4}\frac{GMm}{R}$

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1. A.
   $2GM\left(\frac{1}{R} - \frac{1}{R_0}\right)$
2. B.
   $\left[2GM\left(\frac{1}{R} - \frac{1}{R_0}\right)\right]^{1/2}$
3. C.
   $GM\left(\frac{1}{R} - \frac{1}{R_0}\right)$
4. D.
   $2GM\left[\frac{1}{R} - \frac{1}{R_0}\right]^{1/2}$

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1. A.
   $\sqrt{\dfrac{20gR}{11}}$
2. B.
   $\sqrt{\dfrac{10gR}{11}}$
3. C.
   $2\sqrt{gR}$
4. D.
   $\sqrt{gR}$

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