Two objects X and Y hang from a uniform rod that is pivoted at its centre. The rod is balanced. Which statement about X and Y is correct?
- AThe mass of X is $0.4$ times the mass of Y.
- BThe mass of X is $2.5$ times the mass of Y.
- CThe mass of X is $3.5$ times the mass of Y.
- DThe mass of X is equal to the mass of Y.