The red and blue ball are attracting the green ball with their gravity. The green ball describes a trajectory with its movement. You may move the red and blue ball positions until the green ball trajectory matches with the proposed one.Touch the screen and slide to move the balls. Observed the predicted trajectory in real time. Pay attention to the color of the trajectory: It indicates how close it is to the red and blue balls. Observe also the size and the brightness of the balls: It is related with the gravity force.
Trajectory Match
