(a) t = 0 ⇒ h 1 = 1. The initial height of the fi rst missile is 10 m above the ground. t = 0 ⇒ h 2 = 10. The initial height of the second missile is 100 m above the ground.
(b) t
h 1 h 2
10 9 8 7 6 5 4·8 4 3 2 1 2·3 0 0·5 (c) t = 2·3 s at h = 48 m 284 1 1·5 Seconds 2 2·5 3 t