Q 11-06-179JEE MainJEE Main 2020 (6 Sep, Shift 2)Easy
The centre of mass of a solid hemisphere of radius $8$ cm is $x$ cm from the centre of the flat surface. Then the value of $x$ is ______.
Numerical value type. Enter your answer.
Answer: 3
For a solid hemisphere the centre of mass lies on the symmetry axis at $\dfrac{3R}{8}$ from the centre of the flat face:
$$x = \frac{3\times8}{8} = 3\ \text{cm}$$
Solution by Sreeraj P, M.Sc Physics