1973M3. A ball of mass m is attached by two strings to a vertical rod. as shown above. The entire system rotates at constant angular velocity ω about the axis of the rod.
a. Assuming ω is large enough to keep both strings taut, find the force each string exerts on the ball in terms of ω, m,g,R, and θ.
b. Find the minimum angular velocity, ωmin for which the lower string barely remains taut.