Question

Masses $8$kg, $2$kg, $4$kg & $2$ kg are placed at the corners P, Q, R & S respectively of a square PQRS of side $80$cm. The distance of x co-ordinate centre of mass from P will be?

• A. $20$cm
• B. $30$cm
• C. $40$cm
• D. $60$cm

Answer 1

The correct option is A $20$cm

$x=\frac{2\times 0.56+4\times 0.56}{16}=\frac{3.36}{10}=0.4$

$y=\frac{2\times 0.56+2\times 0.56}{16}=0.0441=0.4=0.0296$