Question

What will be the position of centre of mass of a half disc of uniform mass density as shown

• A. $\frac{2a}{\pi}$
• B. $\frac{4a}{3\pi}$
• C. $\frac{a}{\pi}$
• D. $\frac{2a}{3\pi}$

Answer 1

Answer: (B)

$\frac{4a}{3\pi}$

Answer 2

Fact that C.O.M. of hait disk is at distance of $\frac{4a}{3 \pi}$ from center.