Questions

Block B has mass m and is released from rest when it is on top of wedge A, which has a mass 3m. Determine the tension in cord CD needed to hold the wedge from moving while B is sliding down A. Neglect friction.

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2mgcos⁡θ

mg2cos⁡θ

mg2sin⁡2θ

mgsin⁡2θ

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detailed solution

Correct option is C

T=N⋅sin⁡θ and N=mgcos⁡θT=mgcos⁡θsin⁡θ=mg2sin⁡2θ

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