Question

A cubical block of mass m and side length a is placed on rough horizontal surface. A horizontal force Fis applied at the top of cube so as to
just topple the cube without sliding. Torque of normal reaction about centre of block at this moment, is​

Answer 1

Answer:

Clearly, the block shall topple about its edge through O. The torque FL of the applied force is clockwise. The torque mg

2

L

of the weight is anticlockwise.

Applying condition for rotational equilibrium.

−FL+mg

2

L

=0 or F=

2

m