The speed of a bobsled is increasing, because it has an acceleration of 3.28 m/s2. At a given instant in time, the forces resisting the motion, including kinetic friction and air resistance, total 624 N. The mass of the bobsled and its rider's is 254 kilogram.
(a) Find the magnitude of the force propelling the bobsled forward?
(b) Find the magnitude of the net force that acts on the bobsled?