A particle is moving in a circle of radius R in the xy plane. During the motion, neither the x- nor y-component of the particle's velocity exceeds v. Find the minimum possible time for the particle to complete one circle. (I.e., find the minimum possible period of revolution.) Hint 1: I don't think it can be solved without Calculus. Hint 2: Answer is in the form of an equation without any rounding of any numbers involved. Considering I haven't taken Calculus yet I don't know the right way to approach this problem.