/* etoys acceleration vs Mathematical acceleration */
/* Select whole program and press [do it]! */

acc= 1.0; /* acceleration for both */
v1= 0.0; /* velocity for etoys version */
p1= 0.0; /* position for etoys version */

for (t= 0; t < 20; t++) {
  pre1= p1
  p1 += v1;
  p2= 1/2 * acc * Math.pow(t, 2);
  show("etoys: " + pre1 + " + " + v1 + " = " + p1 + "\n");
  show("math:  1/2 * " + acc + " * " + t + "^2 = " + p2 + "\n");
  v1 += acc;
}