The direction of the frictional force must be
{"Image DocumentName": "The direction of the frictional force must be", "Image ImageDescription": "correctly determined by the direction of motion. Sometimes this may not be given and is not obvious. We would have to make an assumption and carry. out the analysis. After obtaining the results, we then check that the assumed frictional force is opposite to the motion. If not, then our assumed direction of the frictional force is incorrect and we have to do another analysis.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}