2. A horizontal 100 N force is applied to a 10.0 kg object on a level surface. The force of friction between the object and the surface is 20.0 N. Determine the magnitude of the object's acceleration. Problems 1. Determine the net force acting upon a 1000 kg rocket accelerating at 5.0 m/s directly upwards. [5.0 kN upwards] 2. A ball started from rest and acquired a speed of 12 m/s when a force is applied for a distance of 50 cm. If the ball has a mass of 1.0 kg, determine the magnitude of the force applied. [0.14 kN] 3. Free-body diagrams (FBD) are necessary to communicate an understanding of the forces acting on an object and are a typical first step for solving force questions. A free-body diagram identifies the forces acting on an object, shows their direction, and indicates their relative magnitudes. Complete the free-body diagrams below: Force due to gravity F Normal force Applied force FN Fapp Force of friction Ff a. A block is stationary on a horizontal surface. b. A block is being pulled at a constant velocity to the right against a force due to friction.