1. A dump truck is being filled with sand. The sand falls straight downward from rest from a height of 2.00 m above the truck bed, and the mass of sand that hits the truck per second is 55.0 kg/s. The truck is parked on the platform of a weight scale by how much does the scale reading exceed the weight of the truck and sand? 2. J = Ft p=mv mv(f) - mv(0) 3. i am completely lost.