Change kinetic animation formula to be more realistic.

Rate of decay (number, must be negative) =
α

Minimum velocity (pixels/millisecond) =
v_min

Initial velocity (pixels/millisecond) =
v₀

Velocity at time t (pixels/millisecond) =
    α⋅t
v₀⋅ℯ

Distance travelled at time t (pixels) =
   ⎛ α⋅t    ⎞
v₀⋅⎝ℯ    - 1⎠
─────────────
      α

Duration of animation (milliseconds) =
   ⎛v_min⎞
log⎜─────⎟
   ⎝  v₀ ⎠
──────────
    α

Total distance travelled (pixels) =
-v₀ + v_min
───────────
     α

Easing function =
   ⎛ α⋅duration⋅t    ⎞
v₀⋅⎝ℯ             - 1⎠
──────────────────────
     -v₀ + v_min
Calculate kinetic effect from the last points average

instead of the average between now and the -200ms point.