The classic projectile motion question of the range of a fired cannon is brought dynamically alive by this java applet from the University of Oregon Virtual Lab. The student has control of the angle of the cannon and velocity of the ball in an attempt to hit a distant target. The trajectory of multiple attempts are show in different colors. In this simulation two mass are connected by a rope running over a pulley. M2 is a free fall object.
Students can control the angles and the velocities of each cannon.
We suggest using it as a Student Challenge to verify and prove the observation. The mirror formula and lense formula are demonstrated dynamically by this java applet showing very well the ray diagrams, object distance, image distance, focus and magnification of images. Excellent for students to conceptualize and estimate the position of the image. This applet opens with a Periodic Table with a spectral chart above. Clicking on any element displays either its emission or absorption spectrum on the screen.