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Model rocket launch

  • Thread starter Zacharrry
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  • #1
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Homework Statement


A model rocket is launched straight upward with an initial speed of 50.0 m/s. It accelerates with a constant upward acceleration of 1.50 m/s2 until its engines stop at an altitude of 110 m.
(a) What is the maximum height reached by the rocket?
(b) How long after lift-off does the rocket reach its maximum height?
(c) How long is the rocket in the air?

Homework Equations


One of the "big four" kinematics equations.

The Attempt at a Solution


I am having difficult setting the problem up and finding an answer for each of the questions.
 

Answers and Replies

  • #2
Merlin3189
Homework Helper
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Consider the two parts of flight separately.

For the first part you need to find the time and the speed at 110 m

When you have that speed, you can tackle the second part of the flight and find that time.

I would sketch a diagram and mark in what you know and what you need to know at the specified points - ground, 110 m and top.
 

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