A piece of stone of mass m is rotating at constant angular speed ω in the vertical plane about the point O as shown in the figure. A rope of length R connects the ball to O. If the rope breaks when the stone is at A, calculate how long it takes before the stone falls back to the same level (y=0). Pick the closest answer in seconds. http://huygens.zones.eait.uq.edu.au/courses/engg1400/pic/ball_on_a_rope.jpg R[m] = 2 w [rad/s] = 15 m [kg] = 5 I have been attempting this question but I have no idea as to where to start? If anyone could give me a hand that would be great.