At the train station, you notice a large horizontal spring at the end of the track where the train comes in. this is a safety device to stop the train so that it will not plow through the station if the engineer misjudges the stopping distance. while waiting, you wonder what would be the fastest train that the spring could stop at its full compression which is l=3 ft . to keep the passengers safe when the train stops, you assume a maximum stopping acceleration of g/2. you also guess that a train weighs half a million lbs. for purpose of getting an estimate, you decide to assume that all frictional force are negligible.
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Physics, 22.06.2019 12:10, hilljade45
Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?
Answers: 2
Physics, 22.06.2019 14:30, joslynndiggs
Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)
Answers: 1
At the train station, you notice a large horizontal spring at the end of the track where the train c...
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