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2. Read the instruction carefully and click on View a Sample analysis to see an example. Click on Begin Activity to go to the next step. 3. Select 1.5-kg brick/3.0-kg cart/medium speed conditions to run the simulation. This corresponds to the completely inelastic collision in which the cart hits a brick at rest then combine and move together. 4. Click on Analyze Data to show the collision point and the distance scale. 5. Select two points (the farther apart, the better accuracy) before the collision for analysis. Estimate and record the displacement and the time interval between the points to calculate the speed before collision. 6. Find the momentum of the cart, of the brick, and the total momentum before the collision. 7. Repeat the same procedure to estimate and record the displacement and the time interval, then determine the speed of the cart/brick combination after collision. 8. Find the momentum of the cart/brick combination after collision. 9. Record the results from the previous steps in the first data table below. 10. Compare the before and after momentum by calculating total momentum change, Δp=pf−pi, and the percent change, (Δp/pi)×100%, from the initial momentum. 11. Repeat for a different brick/cart/speed condition. Enter data into the second table.
TABLE 1 DATA:
Analyze the ticker tape diagram (dot diagram) left by the cart to determine the pre-collision and postcollision velocities. Combine this velocity information with the mass values to determine the total momentum of the system before and after the collision. Can you gather such data and present it as evidence to support the principle that momentum is conserved by the system? Given: The ticks (dots) are left by the cart every 1/60-th of a second. So the spacing between every 6th dot (for example, from the 1 st dot to the 7 th dot) is equal to the distance traveled in a time of 0.10 seconds.
TABLE 2 DATA:
Analyze the ticker tape diagram (dot diagram) left by the cart to determine the pre-collision and postcollision velocities. Combine this velocity information with the mass values to determine the total momentum of the system before and after the collision. Can you gather such data and present it as evidence to support the principle that momentum is conserved by the system? Given: The ticks (dots) are left by the cart every 1/60-th of a second. So the spacing between every 6th dot (for example, from the 1 st dot to the 7 th dot) is equal to the distance traveled in a time of 0.10 seconds.
Brick mass =1.5 kg; Cart mass =3.0 kg; Medium speed Brick mass =1.5 kg; Cart mass =4.0 kg; Slow speed
Based on the momentum percent change data, do you think the collisions agree with the conservation of momentum law? If the answer is yes, explain your reason. If the answer is no, what do you think the factors that contribute to the disagreement? B. Does the cart move faster, slower, or the same speed after the collision? Is this what you would have guessed? Explain your reason.