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I have two objects (same size, same geometry) falling from different heights; obviously the object in the higher position speed up and has a different behavior when hitting the ground, compared to the other object.

How can I keep the velocity constant at all times, until they hit the ground?

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    $\begingroup$ All object fall at the same weight, regardless of mass or size. The force that slows different objects down is friction. $\endgroup$ – Nate_Sycro27 Dec 9 '19 at 12:38
  • $\begingroup$ Height, not weight...I could modify the damping value but I don't want to act on rigidbody dynamics; are there other methods to achieve the result? $\endgroup$ – Riccardo Centi Dec 9 '19 at 12:57
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    $\begingroup$ Speed, not weight. Sorry. $\endgroup$ – Nate_Sycro27 Dec 9 '19 at 13:05
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    $\begingroup$ @Nate_Sycro27 you mean rate, not speed ... i.e. acceleration ( or rate of change of speed ). The only thing that changes speed is a force, at or near a massive object this force will be the gravity. Blender fakes gravity by default for earthlings. To stop this you turn the gravity off in the scene properties. $\endgroup$ – Moog Dec 9 '19 at 14:41
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Set gravity to 0 and give them both same initial velocity

(also make sure to give em a lot of solver iterations/steps per second so physics calculate nicely) enter image description here

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  • $\begingroup$ how can I do this showed in the panel below the animation? I can't change the interpolation mode. $\endgroup$ – Riccardo Centi Dec 10 '19 at 9:51
  • $\begingroup$ Are you refeering to Graph Editor? If that's so, I changed interpolation by selecting the keyframes and pressing T $\endgroup$ – Alumx Dec 11 '19 at 12:02
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Turn off GRAVITY (no gravity at all), than add WIND with say value of 100 (with an arrow pointing down). All object will fall at constant rate (with no acceleration).

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