2) A platform scale calibrated in Newtons is placed on the bed of a truck driven at constant speed of 14 m/s. A box weighing 500 N is placed on a scale. Find the reading on the scale if: a) The truck passes over the crest of a hill with a radius of curvature 100 m. b) The truck passes through the bottom of a dip with a radius of curvature 80 m.