Question: A cart with a trapezoidal shape, as in the figure, carries a blue box of unknown mass on its slanted, flat surface. The surface

A cart with a trapezoidal shape, as in the figure, carries a blue box of unknown mass on its slanted, flat surface. The surface makes an angle of 15 with the horizontal. The box is not sliding up or down relative to the slanted surface, staying always at the same height. The free-body diagram for the blue box is shown on the right of the figure. n is the normal force, and FG is gravity. There are no other forces acting on the blue box. What is the acceleration of the cart? If needed, use g = 9.81 m/s. 15 12 n

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