A 0.1 kg model rocket is launched vertically from rest at time t = 0 with a constant thrust of 10 N for one second and no thrust for t>1 s. Neglecting air resistance and the decrease in mass of the rocket, determine (a) the maximum height h reached by the rocket, (b) the time t required to reach this maximum height. Oh = 640 m, t = 8.59 s Oh = 520 m, t = 12.37 s Oh = 430 m, t = 9.72 s Oh = 460 m, t = 10.19 s