A square plate of mass 120 g and edge 5.0 cm rotates about one of the edges. If it has a uniform angular acceleration of 0.2rad/s2, what torque acts on the plate ?
A square plate of mass 120 gm and edge 5 cm rotates about one of the edge.
Let take a small area of the square of width dx and length a which is at a distance from the axis of rotation.
Therefore, mass of that small area
(m = mass of the square, a = side of the plate)
Therefore torque produced