question_answer

A solid sphere having mass m and radius r rolls down an inclined plane. Then its kinetic energy is                                                                                                                                      [JEE ONLINE 07-05-2012]

A)  \[\frac{5}{7}\]rotational and \[\frac{2}{7}\]translational

B)   \[\frac{2}{7}\]rotational and \[\frac{5}{7}\]translational

C)   \[\frac{2}{5}\]rotational and \[\frac{3}{5}\]translational D)   \[\frac{1}{2}\]rotational and \[\frac{1}{2}\]translational Correct Answer: B Solution : [b]

Hence option   is correct