Forces/Friction I'm new, so I'd like to say thanks in advance for helping me. The site wants all answers to the 4th decimal place. Idk how stuff normally works around here, but a small explanation with the answer would help me understand this stuff better. 1. Three forces act on a particle that moves with an unchanging velocity v = (6 m/s) i - (7 m/s) j. Two of the forces are FA = (4 N) i + (5 N) j + (-2 N) k and FB = (-5 N) i + (8 N) j + (-4 N) k. What is the third force? _____N i + _____N j + _____N k 2. A baseball player with mass m = 76 kg, sliding into second base, is retarded by a frictional force of magnitude 500 N. What is the coefficient of kinetic friction µkin between the player and the ground? _____ 2. I'm unsure because I missed class with an awesome case of food poisoning. -_- 3. I was sick in class, so I'm unsure.