Question

Question 3: In order to determine the force of friction and the coefficient of kinetic friction, you will use Vernier Video Analysis to find the acceleration of the cart. You will use the following video to determine these values. Download the following video and open up Vernier Video Analysis, and then import the video into the program. You need to begin your analysis after the hand is no longer pushing the cart and finish when the cart has come to a complete stop. You can assume that the track is 120.0 cm long and that the cart has a total mass of 0.9905 kg. a. Collect the data and create a velocity vs. time graph. The velocity should be linear. If you have data that was taken while the cart was still being pushed or has come to a stop, then either delete those points or just highlight the part of the graph corresponding to the linear part. Is the data linear over all the data points, or do you need to adjust the range of your data to choose only the linear portion? i. YES ii. NO. Before moving on adjust the range of your data to include or eliminate some data points. b. Apply a linear curve fit using the graph tools. Record the slope, which is the acceleration of your cart due to friction slowing it down. slope = a (m/s2) = -16.13 m/s2 C. Export your graph and upload it below. Make sure to include a title, and label your axes well. You may want to reference the checklist for graphs. Velocity vs Time of a Cart After Being Pushed LINEAR 60 x-range: 0.00 - 3.07 y=mx.b m: -16.13 b: 51.03 T: -0.9923 RMSE: 1.931 50 40 36.64 cm * Velocity fem/ 20 10 0 0.00 0.25 0.50 0.75 1.03 1.25 1.50 2.00 2.25 2.50 2.75 3.00 @ Time (s)

Answer 1

Q7 (62 slope ax = -16.13 cm/2 Ay (m/52) = -0.1613 m/52 Ffr -ma 1 m=o.ggo5 kg a = 601613 mlos, Efr= 0.9905X0.1613 Ffr= 0.1598 N QUO Fn = mg m=o.ggos kg ga 9.80 mat Fo (N) = 0.9905X3.80 FN (N) =9.707 co Fto Mk= -0.0164 FN is in the correct range. 0.159 & 9.707 Yes my Mk