A 2 kg box slides along a hockey rink and collides with a 20 kg box. Draw the two boxes colliding. With one arrow on each box, show the relative size (length of arrow) and direction of the collision force on each box while they are in contact. Circle the box that experiences the greater acceleration.

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

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle