Velocity vs. Time graph of a Ball Rolling down the Ramp. The graph is linear. Two points on the graph are (0,1) and (6,4). Image created by NCVPS Developer What is the acceleration of this ball after 6 s of rolling down the ramp? Velocity vs. Time graph of a Ball Rolling down the Ramp. The graph is linear. Two points on the graph are (0,1) and (6,4). Image created by NCVPS Developer What is the acceleration of this ball after 6 s of rolling down the ramp? 1.5 m/s2 1.25 m/s2 0.67 m/s2 0.5 m/s2