To enhance animations in a scene, you can add effects to modify the linear motion of moving objects, using one of the following built-in dynamics:

To apply one of these effects to an animation, add the dynamics attribute to the animation node, as shown below in bold:

<animation id="myAnimation" repeatCount="0">
  <animate name="left" type="style" from="100" to="500" begin="0ms"
    end="2000ms"  dynamics="accelerate" />
  <animate name="left" type="style" from="500" to="100"
    begin="2000ms" end="4000ms"  dynamics="ease" />
</animation>