t = 1.48 (slider from 0 to 2, step 0.02)
g = Vector((0, -10))
v0 = Vector((10, 10))
a = CurveCartesian(10 * t, 10 * t - 5 * t * t, t, 0, 2)
A: (10 * t, 10 * t - 5 * t * t)