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Problems with Pseudo Force

A block of ma...

Question

A block of mass 'm' is hanging to a string in an elevator. The elevator is moving up with an acceleration 'a'. What will be the tension in the string?

A

ma

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B

m(g+a)

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C

m(g-a)

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D

mg

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Solution

The correct option is B m(g+a)
If we include the pseudo force and use free body diagram, we have
T = mg+ma

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