5. A 200 gram tennis ball strikes the ground at an angle of 40' and a speed of 8.7 ms". The ball rebounds at the same angle but with a speed of 5.8 ms". The magnitude of the change in velocity of the ball is about: A. 2.9 ms-1 B. 6.2 ms-1 C. 9.6 ms-1 D. 10.4 ms-1 6. In one of Gallileo's famous "thought" experiments he imagined that a cannonball was dropped for the top of the mast of a moving ship. Cannonball 22 m 3 ms-1 Suppose the boat's forward speed was 3 ms" and the mast was 22 m high, the position that the cannonball would land would be approximately: A. 6.4 m behind the mast B. 3.2 m behind the mast C. Directly below the mast D. 6.4 m in front of the mast 7. Which of the following graphs applies for an accelerating object? Displacement Velocity Displacement Velocity ID) iv) Time Time Time Time A. i), ii), iii) B. i). iv) C. ili), iv) D. i), ii), iv)