What is the potential energy at the end of the loop? what is the kinetic energy at the end of the loop (based upon the photogate time) I PUT THE TIME ON THE PICTURE? oh also can you help me find the speed of the car at the bottom of the hill like i know speed is distance multiples by time but i don’t know what number to use for distance.. the same picture shows some data i just don’t know how to use it. thanks would be greatly appreciated

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