Two rockets are launched at a fireworks display. Rocket A is launched with an initial velocity v0 = 100 m/s and rocket B is launched t1 seconds later with the same initial velocity. The two rockets are timed to explode simultaneously at a height of 500 m as A is falling and B is rising. Assume a constant acceleration g = 9.81 m/s2 Determine the time t1. The time t1 is ____s.

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Projectile Motion