PHYS 231 Exp 8 Lab Report

# PHYS 231 Exp 8 Lab Report - Analysis Questions 1 Why does...

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Analysis Questions 1. Why does the total momentum before the collision include only the momentum of the ball? Why isn’t the momentum of the pendulum included? The pendulum was at rest initially, so its initial velocity is 0 m/s, and because p = mv , its resulting initial momentum is 0 J. 2. Does your analysis support the Law of Conservation of Momentum? Explain. Yes, the Law of Conservation of Momentum is supported because the calculated initial and final momentum equal to each other (refer to Part A of Data and Analysis section). In other words, there was no change in the total momentum of the system before and after the collision. 3. Compare the kinetic energy just before the collision and just after the collision. What was the KE before? What was the KE after? Is it experimentally significant? Calculate the % difference. Show your work. Yes, the values are experimentally significant. As shown on Data Table 1 on Part A of Data and Analysis , the KE before collision was 1.65 J, and the KE after collision was 0.348 J. By calculating the percent difference, it shows that the kinetic energy decreased

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