008 10.0 points
A 75 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.
20°
What is the reading on the scale if the angle
of the slope is 20°? The acceleration due to
gravity is 9.81 m/s?
Answer in units of N.