Normal force in an elevator
11:49
Normal force in an elevator
Jun 20, 2011
Khan AcademySal Khan
Consider the velocity vs. time graph of a person in an elevator shown in Figure. Suppose the elevator is initially at rest. It then accelerates for 3 seconds, maintains that velocity for 15 seconds, then decelerates for 5 seconds until it stops. The acceleration for the entire trip is not constant so we cannot use the equations of motion from Motion Equations for Constant Acceleration in One Dimension for the complete trip. (We could, however, use them in the three individual sections where acce
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The graph below shows the distance versus time for an elevator as it moves up and down in a building. Compute the elevator velocity at the following times: a) 4 s, b) 16 s, and c) 30 s.
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A graph is plotted of the vertical velocity component of an elevator versus time. (a) How high is the elevator above the starting point (t=0) after 20 s have elapsed? (b) When is the elevator at its highest location above the starting point? | Numerade
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A graph is plotted of the vertical velocity vy of an elevator versus time. The y -axis points up. (a) How high is the elevator above the starting point (t=0) after 20 s has elapsed? (b) When is the elevator at its highest location above the starting point? (GRAPH CANNOT COPY) | Numerade
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numerade.com
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