Which of the following statements IS NOT true for a stone attached to a string and swung in a uniform vertical circular motion? 1. The magnitude of resultant force acting on the stone changes depending on the position of the stone in the circle. 2. The tension in the string is lowest when the stone is at the highest point of the circular motion. 3. The kinetic energy of the stone is constant throughout the entire circular motion. 4. The resultant acceleration is always directed towards the centre of the circle.