Question

The distance of centres of mass of two square plates system a shown from point O. If masses of plates are 2m and m is (their edges are 'a' and '2a' respectively)-

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

Answer 1

Answer: (B)

a

Answer 2

$x_{cm} = \frac{2m \times \frac{a}{2} + m \times 2a}{3m}$ = a

$y_{cm} = \frac{2m \times \frac{a}{2} - ma}{3m}$= 0