A rectangular block has a square base measuring $a \times a$ and its height is $h$. It moves on a horizontal surface in a direction perpendicular to one of the edges. The coefficient of friction is $\mu$. It will topple if
A$\mu > \frac{h}{a}$
B$\mu > \frac{a}{h}$
C$\mu > \frac{2a}{h}$
D$\mu > \frac{a}{2h}$
Medium
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B$\mu > \frac{a}{h}$
b $\mathrm{C}:$ center of mass
$\tau_{C}=\mathrm{f} \frac{\mathrm{h}}{2}-\mathrm{N} \frac{\mathrm{a}}{2} \geq 0$ for toppling
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