A sphere of mass $2 \mathrm{kg}$ and radius $0.5 \mathrm{m}$ is rolling with an initial speed of $1{ \mathrm{m} \mathrm{s}}^{-1}$ goes up an inclined plane which makes an angle of $30°$ with the horizontal plane, without slipping. How low will the sphere take to return to the starting point $A$?

• A

  $0.60 \mathrm{s}$
• B

  $0.52 \mathrm{s}$
• Correct answer
  C

  $0.56 \mathrm{s}$
• D

  $0.80 \mathrm{s}$

Hence, the correct answer is option: 'C'.