Desde lo alto de un edificio se deja caer un objeto de 2Kg de masa. El cuerpo cae desde una altura de 45 metros en un lugar donde la gravedad es igual a 10 m/s2. ¿Cuál es el tiempo que tarda en recorrer los 45 metros de altura?

audio tape

explanation:

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

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