where ϕ is the angle between →r and →F, as shown in Figure \PageIndex1. Fsinϕ is precisely the component of →F that is perpendicular to →r, so we...where ϕ is the angle between →r and →F, as shown in Figure \PageIndex1. Fsinϕ is precisely the component of →F that is perpendicular to →r, so we could also write the magnitude of the torque as: τ=rF⊥ which highlights that only the component of the force that is perpendicular to →r contributes to the torque.