A bowling ball (m = 7.0 kg) has been attached to the end of a 4.0 m long cord. The other end is afxed to the ceiling, allowing the ball to swing freely at the end of the cord like a pendulum. The bowling ball is pulled back so that the cord makes an angle of 60 with the vertical, and the ball is drOpped from rest. How fast is the ball going when the cord is vertical, at the bottom of the arc? Ignore air resistance and friction. O 6.26 m/s 0 7.28 m/s 0 4.33 m/s 0 5.19 m/s 0 3.24 m/s