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123_lab4_projectile-revised

# 123_lab4_projectile-revised - Physics 123 Minilab 4...

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Physics 123 – Minilab 4 PROJECTILE MOTION Introduction In this experiment you will project a ball horizontally, predict the distance it will travel before striking the floor and compare the predicted distance with the measured distance. Background There are four setups in the room; three students are needed per setup. One student will load and fire the ball, and note the time it takes to pass through an optical gate, one will measure the horizontal distance the ball travels, and the third student will record the data and make sure that all shots are safe. You will fire the ball horizontally from an initial elevation y and measure the horizontal distance x the ball travels before it hits the floor. See Figure 1. Figure 1 The initial horizontal velocity is measured from the time t the ball takes to pass through an optical gate. It varies slightly from one shot to the next. The diameter d of the ball is 2.54 cm. Thus the velocity can be calculated from v=d/ t. (1) Given that the horizontal velocity is constant, the distance

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123_lab4_projectile-revised - Physics 123 Minilab 4...

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