Newton's Laws of Motion Practice (Draw FBD and use Fnet 2 F1 + F1 and Fnet 2 ma) 4. A person stands in an elevator. The person has a mass of 6.0 x 101 kg. Calculate the apparent weight of the person when the elevator is accelerating downwards at 2.5 mlsz. 5. A block of wood of mass m = 250 g is being pulled along a surface by a force F = 20 N. The force of friction between the block and the surface has a magnitude of 15 N as shown. Calculate: a) the acceleration of the block. b) the distance moved, starting from rest, in 5.0 S. 6. A large football player student (1.0 x 102 kg) applies a 6.0 x 102 N force to another equally burly student (1.0 x 102 kg) sitting on a sled (13.2 kg). If sliding friction and air resistance (drag) is 99-5 N, nd the acceleration of the sled. In addition, how much force does the football player need to apply to the ground to accomplish this feat? Remember, he needs to get himself moving too