Question

A model rocket is launched straight upward with an initial speed of 44.0 m/s. It accelerates with a constant upward acceleration of 2.50 m/s^{2} until its engines stop at an altitude of 200 m.

a) How long is the rocket in the air?

Step 1

Consider the initial speed of rocket be *u*, the acceleration of the rocket be *a*, the speed of the rocket just before the engines stop be *v*, the displacement of the rocket, that is, the altitude be *s*, the time interval for the rocket in the air be *t*, and the displacement of the rocket after the engines stop be *h’*.

Write the equation of motion, and solve for the speed of the rocket just before the engines stop.

Step 2

Write the equation of motion, and solve for the displacement of the rocket after the engines stop.

Step 3

The total height or altitude of the ...

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