1. A ball of mass 0.450 kg is attached to a rope and swung in a circle of radius 1.80 m with a centripetal acceleration of 3.10 m/s2 .What is the speed of the ball?
2. A ball of mas 0.250. Kg is attached to a string 0.750 m long. The ball is swung in a s pendulum-type motion such that it has a speed of 6.40 m/s when it reaches the lowest point in its path. What is the corresponding tension in the string?