Lab 6 Momentum and Energy

# 5 multiply the value by the mass found in part 2 and

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5. Multiply the value by the mass found in Part 2 and compare this value with the value from Part 3 Step 3. Data/Graphs Figure 1: Parametric Plot of Wheel Position vs. Wheel Velocity. Figure 2: Acceleration and Mass of the iOlab Device.

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Figure 3: Force vs. Time and Wheel Velocity vs. Time Analysis/Calculations
In figure 1, we see the plot of when the iOlab device was oscillating up and down on a vertical surface. As time went on, the plot spirals inwards therefore, the radius of the circle did not remain constant. In figure 2, we have the force and acceleration therefore using the equation F=ma we can determine the mass of the device. I used the gravitational constant 9.81 m s s for g since gravity is acting upon the object. After calculating for the mass we know that the device has a mass of 0.30 +/- 0.02 kg. F=ma m=F/a m=-1.967 N/ 9.81 m s s m= 0.20 kg Δs s = In figure 3, the highlighted sections of the graph illustrate when the device collided with the vertical surface. I used this in my calculations. First, I found the area under the Force vs. Time graph. This turned out to be 0.12 N. The velocity before collision is -0.440 m/s and the velocity after the collision is 0.30 m/s. Therefore the change in velocity is 0.74 m/s. The calculated momentum before collision is -0.088 kgm s and the change in momentum after the collision is 0.06 kgm s . I then took the change in velocity and multiplied it by the mass we found above. This turned out to be 0.148 kgm s .

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• Spring '08
• Rijssenbeek

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