A 140 kg is attached to a crane , which moves the load vertically. Calculate the tension in the cable for the following case: How far will the load move it starts from rest and accelerates for 20 seconds

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

there are no components of a physical goal mentioned on the list of choices that you've provided.