Question

write the expression for torque in polar coordinates

Answer 1

Here is ur answer hope it helps you

Answer 2

$\bold{\tau = F\times r\times \sin \phi}$

Explanation:

Suppose line of action of force $\vec{f}$ makes an angle $\alpha$ with x − axis.

$\bold{\tau = F\times r\times \sin \phi}$

This is the expression for torque in polar coordinates.

A pair of coordinates locating the position of a point in a plane, the first being the length of the straight line (r) connecting the point to the origin and the second is the angle $\theta$ made by this line with fixed line.