Hello everybody. I have a rather strange question regarding the rotational motion of a solid object across an incline plane. I wonder if it is possible for a solid object to move upwards the plane without the application of any external force, other than its own weight and the friction with the plane. It goes without saying that the object is not thrown across the plane. We just leave it at some point and instead of going downwards as it should this moves upwards. If anyone has any ideas on the subject i would like to hear them. Thank you.