In every panel, the original velocity is shown in black, the velocity a short time ∆t later is shown in blue, and the acceleration is shown in red. (c) Acceleration for an increase in the magnitude of...In every panel, the original velocity is shown in black, the velocity a short time ∆t later is shown in blue, and the acceleration is shown in red. (c) Acceleration for an increase in the magnitude of the velocity. (d) Acceleration for a decrease in the magnitude of the velocity. (e) Acceleration for a change in direction of the velocity at constant magnitude. (f ) Acceleration for a change in velocity that involves both a change in direction and a decrease in magnitude.