Physics - Rotation Question with Solution | TestHub

The kinetic energy of sphere while rolling on an inclined plane is given by $E_K=\text{ Translational kinetic energy }+extRotationalkineticenergy$ $\begin{array}{rl}=& \frac{1}{2}m{v}^2+\frac{1}{2}I{\omega }^2\\ E_K=& \frac{1}{2}\times 2\times (0.5{)}^2+\frac{1}{2}\times \frac{2}{3}\times 2\times (0.1{)}^2\times {\left(\frac{0.5}{0.1}\right)}^2\\ =& 0.25+0.17=0.42\mathrm{J}\end{array}$