where TR1 is the magnitude of the torque from the force of tension, since the tension is perpendicular to the vector →r between the center of mass and the point where the tension is exe...where TR1 is the magnitude of the torque from the force of tension, since the tension is perpendicular to the vector →r between the center of mass and the point where the tension is exerted. We can calculate the particle’s angular momentum just before the collision, so that →r is the vector from the center of the circle to the point where the particle collides (with magnitude R, and perpendicular to →v).
