A brave but inadequate rugby player is being pushed backwards by an opposing player who is exerting a force of 800 N on hime. The mass of losing player plus equipment is 90.0kg, and he is accelerating at 1.20 m/s backward. What is the force of friction between the losing player's feet and the grass? What force does the winning player exert on the ground to move foward if his mass plus equipment is 110 kg? draw a sketech of the situation