# lab #4 - angle of 20 degrees Using some trigonometric...

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Physics of Mechanics PH-110 Experiment # 4 Projectile Motion

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Introduction: The purpose of this experiment is to study the motion of a projectile motion of a projectile and to predict its path. Using a spring loaded launcher we shot our object. After it was released from the gun, the object moves under the influence of gravity alone (neglecting the effects of air resistance). Because the force of gravity is vertical an object will experience a constant vertical acceleration and no horizontal acceleration. Experimental Technique: In order to predict the path of the projectile we needed to calculate the initial speed of the object. The easiest way to find the speed is to see how far the object travels when launched horizontally (0 degree angle) from a known height. Using the equation, 0 0 x x v t = + we can calculate the initial velocity because we know that the initial ‘x’ value is 0. To predict the height of the object mid-flight, we set up the launcher at a stable
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Unformatted text preview: angle of 20 degrees. Using some trigonometric equations, range and trajectory equations, determine the height of the object at or after 150cm from the starting position. Once confident with our calculations we tested our prediction for the professor. Data: Initial Velocity tests, distances launched at 0 degrees: 41.75 in, 40.5 in, 41.5 in, 41 in, 41.5 in. Average distance = 41.25 in or 1.04775 m. Using x x v t = + initial velocity = 4.5320 m/s. Time = 0.23119 s. Using the Range equation we found the distance of the object at the end of the flight to be 1.56 m from the starting ‘x’ value. But, this was used expecting the initial ‘y’ and ending ‘y’ values to be zero. So, at 156 cm in the ‘x’ direction the object is 26.19 cm in the ‘y’ direction (up). Conclusion: Using this data we were able to successfully land the object in the target, giving us a successful lab....
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## This lab report was uploaded on 04/17/2008 for the course PHYSICS PH-110 taught by Professor Gurria during the Spring '06 term at Milwaukee School of Engineering.

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lab #4 - angle of 20 degrees Using some trigonometric...

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