A box of mass 5 kg is pulled by a cord, up along a frictionless plane inclined at 30^ with the horizontal. The tension in the cord is 30 N . The acceleration of the box is (Take g=10 ~m ~s ^ -2 )

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Correct answer: D. 1 ~m ~s ^ -2

T-M g 30=M a 30-5 10 1 2 =5 a a=1 ~m / s ^2

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