Select the trial from one of the two Experimental Conditions screens. Observe the animation; repeat it...
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Select the trial from one of the two Experimental Conditions screens. Observe the animation; repeat it if necessary. Then tap the Analyze Data button. The ticker tape is displayed with a centimeter-ruler positioned below it. The collision point is indicated. Measure the distance associated with 6 spaces (or 12 spaces) between dots on the pre-collision side of the tape. Record the distance and the time on the pre-collision side of the data table. The time is 0.10 seconds for 6 spaces and 0.20 seconds for 12 spaces. Repeat the procedure for the postcollision side of the tape and record. Velocities can be calculated for the cart (before collision) and for the cart and the brick (after the collision) as the distance/time ratio. The mass of the cart and of the brick (shown on the screen) can be used to determine the momentum of each object. The momentum of the individual objects can be summed to determine the system momentum. Because the distance values are the results of measurements, small amounts of error are inherent in the process of determining the momentum of the objects. Data Trial: Before Collision After Collision Mass Distance Time V Distance Time V (kg) (cm) (s) (cm/s) (kg-cm/s) (cm) (s) (cm/s) (kg cm/s) Cart Brick System Select the trial from one of the two Experimental Conditions screens. Observe the animation; repeat it if necessary. Then tap the Analyze Data button. The ticker tape is displayed with a centimeter-ruler positioned below it. The collision point is indicated. Measure the distance associated with 6 spaces (or 12 spaces) between dots on the pre-collision side of the tape. Record the distance and the time on the pre-collision side of the data table. The time is 0.10 seconds for 6 spaces and 0.20 seconds for 12 spaces. Repeat the procedure for the postcollision side of the tape and record. Velocities can be calculated for the cart (before collision) and for the cart and the brick (after the collision) as the distance/time ratio. The mass of the cart and of the brick (shown on the screen) can be used to determine the momentum of each object. The momentum of the individual objects can be summed to determine the system momentum. Because the distance values are the results of measurements, small amounts of error are inherent in the process of determining the momentum of the objects. Data Trial: Before Collision After Collision Mass Distance Time V Distance Time V (kg) (cm) (s) (cm/s) (kg-cm/s) (cm) (s) (cm/s) (kg cm/s) Cart Brick System
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