Problem 3 Solution: You're on a long airplane flight and you're little brother just can't sit still. While a stewardess serves a customer across the aisle, he sticks his 3 g wad of gum onto a string and ties it onto her serving cart. Having served her customer, the stewardess moves toward the next row of passengers, pushing her cart with constant acceleration and causing the gum to swing toward her at a 4o angle and stick right to her stocking.