calculating the velocity and distance of a rocket

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Hossein 2024-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/2111456-calculating-the-velocity-and-distance-of-a-rocket

评论： Torsten 2024-4-25

A rocket gets up from the earth with speed 56.2917 and acceleration-9.81 .I need to solve the equation with ode45 command and get the velocity and distance in t=0:0.01:2.can you help me please

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Hossein 2024-4-25

I tried but it wasn’t useful.

Torsten 2024-4-25

Sorry, but more help would be the solution.

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回答（1 个）

Image Analyst 2024-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/2111456-calculating-the-velocity-and-distance-of-a-rocket#answer_1447406

projectile.m

Why do you need differential equations? velocity = acceleration * time and distance = (1/2) a*t^2 + v*t + d0. You only are giving the downwards accelration due to gravity, not the acceleration due to the rocket thrust. And you are not giving the angle of the rocket but I guess you're assuming it's perfectly vertical.

Attached is a demo for a projectile with no drag with most parameters being variables that you can adjust the initial settings. It computes just about everything you can think of.