Need help making a 2D object rotate, starting from stop and accelerating.

[PeaceByPeace]

Hello,

I am looking for help with what I think should be a simple question. I have a circular object that I want to make rotate. I would like to to start from a stop and gradually start to rotate faster and faster. The final rotation speed does not matter. I know how to make the object spin in place at a constant speed, but not from a stop with constant acceleration. Any help would be great. Thanks!

[RobShultz]

On your first keyframe right click/keyframe assistant Easy Ease out. You can also select the layer and choose the graph editor icon located by the main switches and try to adjust the handle to tweak the speed.

[Dan Ebberts]

Using the formula for angular displacement based on angular acceleration, you could use a rotation expression like this:

a = 100; // angular acceleration
a*time*time/2