7 Lab 3 1-D Motion using DMV.docx

# The final velocity can be v f or vf time squared can

• Lab Report
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The final velocity can be v f or vf. time squared can be t 2 or t^2. Measurements and Calculations for the car (Trial 1, person 1) 1. Calculate the average speed of the car during the 50 cm of motion. a. At which frame is the car released? The car is released at frames+4 b. At which frame does the car reach the 50 cm mark? The front end of the car reached the 50 cm label at frame 200 and exited the label at frame 220. The front bumper was exactly over the 50 cm mark at frame 210. c. How many frames does it take for the car to travel 50 cm? It takes the car 210 frames to travel 50 cm. This is too few frames. It took more than 300 frames. d. How much time is this? It is 6 seconds since it took a second for the car to take off. How can this be? 240 frames is only 1.0 sec. e. Calculate the average speed of the car across this interval. Show your work. Distance traveled is 100cm. It only traveled 50 cm. The time elapsed was 11 seconds. You said the elapsed time was 6 sec in the previous item. average speed = distance/ time taken. 100cm/11 seconds= 9.09 avg. speed. 9.09cm/second 2. Calculate the initial and final speed during the 50 cm of motion. a. What is the initial speed of the car when it is released? The initial speed of the car when it is released is 0. b. Use the initial and average speed to calculate the final speed when the car reaches the 50 cm mark. Show your work. Average speed = (vf-vi)/2 9.09=(vf-0)/2 This is final speed. Average speed = 18.18 cm/s 3. Calculate the average acceleration during the 50 cm of motion. a. What is the average acceleration of the car as it moves 50 cm? Missing. ((end of og section)) Measurements and Calculations for the van (Trial 1, person 2) 4. Calculate the average speed of the van during the 50 cm of motion. a. At which frame is the van released? At 0 frame. b. At which frame does the van reach the 50 cm mark? At 220 frame.

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c. How many frames does it take for the van to travel 50 cm? 220 frames. d. How much time is this? 0.92 second e. Calculate the average speed of the van across this interval. Show your work. Average speed = distance/time = 0.5m / 0.92s = 0.5m/s .5/.92 is not .5 Answer: 0.5m/s 5. Calculate the initial and final speed during the 50 cm of motion. a. What is the initial speed of the van when it is released? Initial speed of the van is 0m/s.
• Winter '19
• Bruce Palmquist
• Velocity

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