ballistic - Pat Popovits PHY121IN Stewart MW Ballistic...

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Pat Popovits PHY121IN Stewart MW Ballistic Motion Lab I. Introduction In this experiment we are trying to prove the claims that the kinematic equations make. We will be using a relatively simple model to test whether or not it conforms to reality. The goal is to prove the ballistic assumptions using the simplest approximation: Air friction has no significant effect on the object’s motion, the horizontal velocity is constant (v x = v cos0) , and the vertical motion (v y = v sin0) is constantly accelerated by gravity (-9.81m/s) which will lead us to the equation ( y = v y t – 4.905 t ) . II. Method Materials used : a projectile launcher, a plunger, collision pad, and a sheet of carbonless paper. 1. The launcher was set up exactly horizontal 2. Spring was pushed back at the 3 rd position (noted) with the plunger 3. Test shot was then done to observe landing point in order to determine where to place the collision pad 4. After collision pad was placed, the photogate was set and a couple of more test shots were done to confirm positioning of the pad and the accuracy of the photogate. 5. A piece of carbonless was placed securely over the collision pad and 3 shots were made, marking each one with a circle. After each trial the
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This note was uploaded on 04/02/2008 for the course PHYS 121 taught by Professor Wormer during the Spring '08 term at Arizona.

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ballistic - Pat Popovits PHY121IN Stewart MW Ballistic...

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