ABC is an equilateral triangle with O as its centre. vector F1,F2 and F3 three forces acting along the sides AB, BC and AC respectively. If the total torque about O is zero then the magnitude of vector F3 is ABC is an equilateral triangle with O as its centre. vector F1 BC and AC respectively. If the total torque about O is zero then the magnitude of vector F3 is F2 and F3 three forces acting along the sides AB August 29, 2020 Category: Chapter 11 - Rotational Mechanics , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics , Facebook Messenger WhatsApp Share this:TwitterFacebook Related