A ball is released from rest at point A and moves along a smooth track ABCDE as shown in Fig. 1.1. The ball is shown at point A and as it passes point B. The ball is always in contact with the track and air resistance is negligible. [Figure 1.1] Fig. 1.2 shows the distance-time graph for the ball as it moves from A to E. [Figure 1.2]

1. (a)(i)On Fig. 1.2, mark: • with the letter P one point where the ball accelerates • with the letter Q one point where the ball has constant speed.[2]
2. (a)(ii)Determine the speed of the ball at point X on Fig. 1.2. Show your working. speed = ........................................................... m/s[3]
3. (b)The speeds of the ball at A, B, C and D are VA, VB, VC and vƉ respectively. Arrange these four speeds from slowest to fastest. slowest → fastest[1]
4. (c)Work is done to transfer energy between energy stores as the ball moves from A to B. Name the force involved in the work done and describe the energy transfer.[3]
5. (d)The track at point B is circular in shape. On Fig. 1.1, draw an arrow to show the direction of the resultant force on the ball at point B.[1]

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