Physics

Problem

9. A ball is thrown vertically upwards with a velocity v and an initial kinetic energy

\mathrm{E}_{\mathrm{k}}

. When half way to the top of its flight, it has a velocity and kinetic energy respectively of (A)

\frac{v}{2}, \frac{E_{k}}{2}

(B)

\frac{v}{\sqrt{2}}, \frac{E_{k}}{2}

(C)

\frac{v}{4}, \frac{E_{k}}{2}

(D)

\frac{v}{2}, \frac{E_{k}}{\sqrt{2}}

(A)

\frac{v}{2}, \frac{E_{k}}{2}

(B)

\frac{v}{\sqrt{2}}, \frac{E_{k}}{2}

(C)

\frac{v}{4}, \frac{E_{k}}{2}

(D)

\frac{v}{2}, \frac{E_{k}}{\sqrt{2}}