A ball is dropped from a height of $10\; m$ & it rises to a height of $5\; m$ . Assuming $\;50 \%\;$ of the energy goes into increasing temperature of ball , the temperature rise is (specific heat of ball's material = $\;1000 JK^{-1}$)

Question

$(a)\;10^{-3} \times 100^{\circ}C\qquad(b)\;10^{-3} \times 50^{\circ}C\qquad(c)\;{10^{-3}}^{\circ}C\qquad(d)\;10^{-2} \times 50^{\circ}C$