Question

Four spheres each of diameter 2r and the mass M are placed with their centres on the four corners of a square of side l then the moment of inertia of the system about an axis along one of the sides of the square is:

• A. $M[\frac{4}{5}{r}^2+2l^2]$
• B. $M[\frac{8}{5}{r}^2+2l^2]$
• C. $\frac{8}{5}M{r}^2$
• D. $M[\frac{4}{5}{r}^2+4l^2]$

Answer 1

The correct option is B $M[\frac{8}{5}{r}^2+2l^2]$