Question

The speed of a homogenous solid sphere after rolling down an inclined plane of vertical height h form rest without sliding is

• A. $\sqrt{\frac{10}{7}gh}$
• B. $\sqrt{gh}$
• C. $\sqrt{\frac{6}{5}gh}$
• D. $\sqrt{\frac{4}{3}gh}$

Answer 1

Answer: (A)

$\sqrt{\frac{10}{7}gh}$

Answer 2

P.E. = total K.E $mgh=\frac{7}{10}mv^2$, $v=\sqrt{\frac{10gh}{7}}$