A hollow sphere rolls down a parabolic path $\mathrm{ABC}$ from a height ' $\mathrm{h}$ ' as shown in the…

A hollow sphere rolls down a parabolic path $\mathrm{ABC}$ from a height ' $\mathrm{h}$ ' as shown in the figure. Portion $\mathrm{AB}$ of the path is rough while $\mathrm{BC}$ is smooth. The height raised by the sphere in $\mathrm{BC}$ is
  1. $\frac{3 \mathrm{~h}}{5}$
  2. $\frac{5 \mathrm{~h}}{7}$
  3. $\frac{5 \mathrm{~h}}{3}$
  4. $\frac{7 \mathrm{~h}}{5}$

Solution

No solution. Refer to answer key.

Asked in: AP EAMCET 2017 (24 Apr Shift 1)

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