A group of students launches a model rocket in the vertical direction. Based on

Question

A group of students launches a model rocket in the vertical direction. Based on tracking data, they determine that the altitude of the rocket was 95.5 ft at the end of the powered portion of the flight and that the rocket landed 14.0 s later. Knowing that the descent parachute failed to deploy so that the rocket fell freely to the ground after reaching its maximumm altitude and assuming that g = 32.2 ftis2, determine the speed vl of the rocket at the end of powered flight, the maximumm altitude reached by the rocket.

Explanation / Answer

a. -95.5 = u*14 - 0.5*32.2*14*14 => u = 3060.1 ft /s b. 0 = 3060.1*3060.1 - 2* 32.2* s => s = 145407 ft therefore maximum height reacehed = 145407+95.5 = 145502.52 ft

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