Free Body Diagrams...help plz!!! hello hello, i'm just having a bit of difficulty concerning free body diagrams: how would i draw an FBD for the following... a) an object has reached terminal velocity. would this mean that the object has reached a constant velocity, therefore force gravity and air resistance are the same? b)an object is at the top of a parabolic trajectory. once again, does that mean that the object is simply at a constant velocity and should be drawn with both Fg and Fair resistance as being even. OR...is the object still following and therefore only draw Fg (force gravity)? c)a ball on a ramp is block from slidding down the ramp. i have the Fn and Fg of the FBD, but i'm just wondering if friction would come in hand in this diagram due to the block. Assistance greatly needed! :D thank you!