text: why does the suspended particles in a moving bus swings forward even if the bus is running against the windf? usually, when we move in a vehicle, the wind flows towards our face. but why suspended particles in a bus also moves forward instead of flowing backward? well, the wind is not a strong enough force to go against the force of motion that propells things forward. and thats if there was any wind getting into the bus, but it has four sides including a windsheild so i don't see how thats possible.