Friction: Winner or Enemy
A time when friction is a winner is when it allows objects to slow down as they are being passed across a surface. In my activity group we sit around a big table with a bag of cookies in the middle. Friction allows us to pass the cookies around the table with enough force so that it slows as it gets to the receiver.
A time when friction is the enemy is when is slows down an object to a stop before it reaches its acquired destination. In the same scenario with the cookies being passed across the table, there often isn’t enough force applied to the bag of cookies to reach its receiver. Friction slows down the bag too soon and leaves it annoyingly unreachable in the middle of the table.