Keep the negative value while squaring

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Adam Hunt
Adam Hunt 2020-3-2
评论： Adam Hunt 2020-3-2
Acc_Rocket(t) = (Thrust - weight - drag*Velocity(t)^2)./mass;
when the velocity is negative, the drag should be positive, but squaring the velocity makes the drag negative again, is there a way to make the velocity value keep its negative sign even when squared.

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James Tursa
James Tursa 2020-3-2
Change this
Velocity(t)^2
to this
abs(Velocity(t)) * Velocity(t)

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