The earthmover initially carries 10m3 of sand having a density of 1520 kg/m3. The sand is unloaded

Question:

The earthmover initially carries 10m3 of sand having a density of 1520 kg/m3. The sand is unloaded horizontally through a 2.5 m2 dumping port P at a rate of 900 kg/s measured relative to the port. Determine the resultant tractive force F at its front wheels if the acceleration of the earthmover is 0.1 m/s2 when half the sand is dumped. When empty, the earthmover has a mass of 30 Mg. Neglect any resistance to forward motion and the mass of the wheels. The rear wheels are free to roll