Quick General Physics 1!?

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Eco-S

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A 64 kg student weighs himself by standing on a scale mounted on a skateboard that is rolling down an incline, as shown. Assume there is no friction so that the force exerted by the incline on the skateboard is normal to the incline. The acceleration of gravity is 9.81 m/s2 . What is the reading on the scale if the angle of the slope is 30 degrees? Answer in units of N.

Thank you for your help!
 
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