Question: A 65-kg boy weighs himself by standing on a scale mounted on a skate- board that is rolling down an incline, as shown in Figure.

A 65-kg boy weighs himself by standing on a scale mounted on a skate- board that is rolling down an incline, as shown in Figure. Assume there is no friction so that the force exerted by the incline on the skateboard is perpendicular to the incline. What is the reading on the scale if Ө = 30°?

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