Physics
Tensional forces normally cause which one of the following?

Strike-slip faults
Normal faults
Thrust faults
Reverse faults

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Physics
Railway tracks are banked on curves

necessary centrifugal force may be obtained from the horizontal component weight of the train
to avoid frictional force between the tracks and wheels
necessary centripetal force may be obtained from the horizontal component of the weight of the train
the train may not fly off in the opposite direction

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