Cliff PHET

Feel free to work with a partner, but make your lab different from theirs by choosing different distances, and velocities. Do your own calculations. You will turn in your own work on a sheet of paper as evidence you did this lab.

1. Click Here to launch the simulation and then choose "Lab"

2. Drag the platform of the launcher up to some height - like 10 m, and rotate the barrel down to 0^o so that it shoots level (Like the cliff problems we solved)

3 Choose a launch speed by dragging the "Initial Speed" selector. Do not launch the projectile yet! Pick your own height, not the height I pick in the video.

4. Set up a H|V table of XViVfat, and calculate where the projectile will land. You know for the horizontal side, velocities, and acceleration, and for the vertical side, initial velocity, acceleration, and displacement.

5. Drag the target to where the projectile will land, and hit the red "Fire" button to launch the projectile. Feel rewarded by the three stars that briefly appear. Hit the Eraser to remove the tracks after you have basked in the glow of your triumph.

Steps 1-5:

6. Now move the target either farther or nearer, and calculate using another H|V table what the initial launch velocity must be to hit your target. (The reverse of what you just did) Keep your height the same as it was in the previous part.

7. Drag the slider for "Initial Speed" to the velocity that is closest to the one you calculated. (And be frustrated that it can only be integers) Hit the "Fire" button and again be rewarded. Possibly by fewer than three stars as your velocity might not have been as accurate.

Steps 6 and 7: