Five friends each do the same amount of work lifting crates up onto shelves. The time it took each person are shown below in the table
Meg 2.5 Andrew 1.7 Ryan 3.2 Amy 1.5 Tom 2.2
Place the friends in order of increasing power

truck y has a greater velocity than truck x.

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