Question:
The centre of mass of a solid hemisphere of radius $8 \mathrm{~cm}$ is $x \mathrm{~cm}$ from the centre of the flat surface. Then value of $x$ is ______
Solution:
(3)
Centre of mass of solid hemisphere of radius $R$ lies at a
distance $\frac{3 R}{8}$ above the centre of flat side of hemisphere.
$\therefore h_{\mathrm{cm}}=\frac{3 R}{8}=\frac{3 \times 8}{8}=3 \mathrm{~cm}$