Question

When force is parallel to the distance between the fulcrum and the line of action of force. What is the formula?​

Answer 1

Answer:

Consider a door hinged at an end to be moved in a circular path. If we keep the end result i.e the circumference covered by the door constant for all conditions (i.e The torque is constant), we see that the product of f and r should remain constant.

Therefore, as r decreases f increases to keep the product same.