A solid sphere of mass 4 kg and radius 28 cm is on an inclined plane. If the acceleration of the sphere when it rolls down without sliding is $3.5 \mathrm{~m} \mathrm{~s}^{-2}$, then the acceleration of the sphere when it slides down without rolling is

• A

  $2.5 \mathrm{~m} \mathrm{~s}^{-2}$
• B

  $3.5 \mathrm{~m} \mathrm{~s}^{-2}$
• C

  $1.7 \mathrm{~m} \mathrm{~s}^{-2}$
• Correct answer
  D

  $4.9 \mathrm{~m} \mathrm{~s}^{-2}$

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