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course Phy 201
6/8 4
Figure 3.43 Projectile Motion ( http://cnx.org/content/m42042/1.8/projectile-motion_en.jar )Physics I Assignment 08: Set the cannon to fire at 70 degrees, at 20 meters / second. Hold your index finger straight up and move it from left to right, keeping it just ahead of the projectile. Try this a few times until you get the 'feel' of the left-to-right motion (click the 'erase' button between trials so you can see the motion). Does your finger speed up or slow down?
Now hold your index finger horizontal, parallel to the floor, and similarly trace the up-and-down motion of the projectile. Does your finger speed up or slow down, and if so where does it do each?
How do you think the acceleration and velocity vectors would behave for this motion?
Submit a copy of your results and insights using the Submit Work Form, with title 'Cannonball Motion'
It speeds up.
It slows down at the top and then speeds back up.
They would move the same direction until they change to the down position and then the velocity would follow the same position as the acceleration