simulation that contains one context with 17 assignments concerning
speed vectors in one and two dimensions. The simulation features
animations from a swimmer and a spaceship. In the first few
questions, the swimmer can only move in one direction, over the
x-axis. Further on, motion in y-direction also becomes an option. In
the end, a current in the x-direction is added to the water in the
animation. The resultant speed vector is also shown.
assignments are equipped with feedback. In some cases, extra images
are added to the feedback (canvasses).