A car moves with a constant speed in a clockwise direction around a circular path of radius r, as represented in the diagram above. If the road were to suddenly become frictionless at the instant shown, the car's direction of travel would be

like poles repel so keep pushing north to north and repels funny to see this

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me