Based on the conventional Cartesian co-ordinate system it is likely that if g-forces are positive in the downward direction, they are also positive in the starboard and forward directions. Similarly, negative g-forces would be in the upward, port and backward directions.Reca wrote:Thinking now about the car, for lateral acceleration is pointless to make a distinction (unless you need to decide, as for example while using accelerometers for data logging, that left is positive and right negative or viceversa but it’s purely convention)...