Direction of force acting on a body in uniform circular motion?? Hello Sir/Ma'am I'm a a novice. I joined this forum to clear my doubts and improve my physics. Here is my question.. " We generally say, frictional force always acts in a direction, opposite to the direction of motion of a body. Is there any case where it acts in a different direction?? For example, if a car is moving around a pole at a uniform speed (uniform circular motion), the friction is acting towards the centre (also called centrepetal force). And we know that the direction of motion of the car at any point is along the tangent i.e perpendicular to the radius. So, 1) Is it correct to say that here, direction of friction is perpendicular to the direction of motion of the body??? 2) And should i conclude that direction of friction force doesn't always need to be opposite to the direction of motion of the body?? 3) are there any other cases where direction of friction is not opposite to the direction of motion of the body?? Two cases i know of are walking and riding a bike. Any other cases?? Sir, this is not a homework question. Kindly dont delete it. It is something which i can't understand. Thanks!!