A decoration, of mass M, is suspended by a string from the ceiling inside an elevator. The elevator is traveling upward at a constant speed. The tension in the string is
A
EqualtoMg
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B
LessthanMg
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C
GreaterthanMg
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D
Impossibletotellwithoutknowingthespeed
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Solution
The correct option is CEqualtoMg Here, the elevator is moving upward with a constant speed, that means acceleration due to gravity is acceleration present.
Due to gravity, a downward force is acting downwards, F=mg.