1. The problem statement, all variables and given/known data If you have a motor pulley and a drum pulley connected by a belt then how do you explain why the belt can sometimes slip if the washing machine is rotating too fast? 2. Relevant equations 3. The attempt at a solution I know that the answer involves the tension of the belt being unable to provide the centripetal force but I can't see where there is a centre seeking force in this system. The pulley grips the belt due to friction I assume but wouldn't that be a sideways force, I can't see where the centripetal force is?