- As you can see the force F can be broken up into two components.
- Fcosθ, which is parallel to the rod and cannot rotate the rod.
- Fsin θ, which is perpendicular to the rod and contributes to the rotation.
- r is the radial distance from the axis of rotation to the point of application of the force
- As the r is increased , the moment or torque produced increased.
Thus torque produced is
Where ‘’ denotes the component of the force which is perpendicular to the radial distance (of rod)
Extract from Physics Stage 6 Syllabus © 2017 NSW Education Standards Authority (NESA)