A ball attached to the end of a string is swung around in a circular path of radius r. If the radius is kept constant and the speed is doubled. 1. the centripetal acceleration increases by a factor of 4. 2. the centripetal acceleration remains the same. 3. the centripetal acceleration decreases by a factor of 4. 4. the centripetal acceleration increases by a factor of 2. 5. the centripetal acceleration decreases by a factor of 2.
