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# A uniform block of mass m is placed on an inclined plane of inclination x. The block has square base of side a and has height h. If coefficient of friction is d, then the condition for block to topple before sliding is?

Arun Kumar IIT Delhi
7 years ago
By torque equation about centre of the block.

$f*a/2>N*h/2$
torque due to mg is zero since it passes through the centre.
until before toppling
$N=mgcos(\theta)$
in limiting case
$f=d*N=d*mgcose(\theta)$
$d>h/a$