This video could also be called "Finding the Force of Friction between a Dynamics Cart and Trackâ€ because we use Newtonâ€™s Second Law to analyze a demonstration and show how negligible the force of friction really is.
0:16 Reading the problem
0:37 Demonstrating the problem
2:30 Translating the problem
3:47 Drawing the free body diagram
4:36 Summing the forces in the x direction
5:32 Solving for acceleration
7:04 Solving for the force applied
7:29 Is the force of friction negligible?
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