2 Next Let S Practice Measuring The Velocity Of The Cart After The Spring Has Returned To Its Unstretched Length Sele 1 (59.02 KiB) Viewed 52 times
2. Next, let's practice measuring the velocity of the cart after the spring has returned to its unstretched length. Select the video for measuring the velocity for this trial: • mass: 602 g • spring stretch: 1 • video view: release Play the video and pause when the string connecting the cart and the spring is slack (no tension) Align the ruler so the Ocm mark is on the center of the green dot in Einstein's hand. Reset the stopwatch. The set up should look like this: . . . . Frames: 0 Time: 0.000000 s Frame Rate: 240fps RESET LOCK Reset stopwatch to zero • Advance the video, and measure the displacement again, and the time for the cart to move that distance. The video may now look like this: Frames: 65 Time: 0.354167 s Frame Rate: 240fps RESET LOCK Align ruler so Ocmis on green marker in Einstein's hand. 30 25 20 15 10 5 Ocm 2. Measure the time for that displacement. Score: 0/10 String is slack (no tension) 1. Advance video and measure the displacement of the cart. 30 25 20 15 10 5 0cm Use the displacement and time measurements to determine the velocity of the cart. What value did you get for the velocity? about 5.3 cm/s about 42 cm/s about 0.024 cm/s Submit Answer * 1/2 submissions remaining Comments: Make sure to divide the displacement by the time.
1. Let's practice measuring the spring stretch for one trial. Here are instructions: • Select the video to measure the spring stretch of the m = 602 grams with spring stretch 1. You should choose: 。 mass: 602g • spring stretch: 1 • video view: spring stretch Place the spring stretch ruler so the zero line is aligned with the spring before it begins stretching. It should look like this: . 0cm Align the "0cm" mark of spring stretch ruler with end of unstretched spring 5 • Advance the video until just before the cart is released. . Measure the elongation of the spring before the string is cut. It should look like this: 0cm 5 What value did you measure? spring stretch = 9.5 cm spring stretch = 20.5 cm spring stretch = 6.5 cm spring stretch = 6 cm 10 15 20 25 this ruler calibrated to measure spring stretch 10 15 20 this ruler calibrated to measure spring: Measure length of spring just before the cart is released. Submit Answer 2/2 submissions remaining
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