Generic Projectile Motion Lab

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I. Introduction- From the beginning of time people have tried to predict how an object will behave when under the object of gravity alone. Galileo preformed an experiment similar to our experiment. He used a metal ramp, a ball and an elevated surface and estimated where the ball would fall based on calculations he had derived from previous experiments. (Anslem Encyclopedia) For our experiment we had a ball roll down an inclined plane, then onto a table, through two photo gates which clocked the time, and the finally off the table. Our reason for doing this experiment was to determine whether it is possible to accurately predict the final position of an object under only the force of gravity, using the laws of projectile motion. X= The final position of the ball. H= The height of the table The equations we used to predict the final position are as follows; X=X0+V0+at2 V=V0+at Then we put the information we knew, and the information we had to solve for in a list. X Y . X0- 0 X0- .0 X-? X- .775 V0 -? V0 - 0m/s V-? V-? A-0m/s2 A - -9.8m/s2 T-? T ? II. Experiment. For our experiment we placed a wooden ruler at an arbitrary angle against the wall on top of a table. Then we set up the photo gates about a foot from the point of contact between the ruler and the table. We set up the photo gates in a way that the laser on each gate was ten centimeters away from the laser on the other photo gate, giving the ball plenty of room to roll in between. Next, using brief calculations, we hypothesized where they ball would land, before placing the ball at the point of connection of the ruler and the wall, letting go of the ball, and allowing it to roll as seen in the below diagram. III

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