What is the force on a hockey puck when shot with a stick? the pucks mass is 0.155 kg and it leaves the stick at 40 m/s. the contact time between the puck and the stick is 1.1 millisecond

According to the  Newton's second law of motion:

Force = mass × acceleration

Acceleration = change in speed ÷ time

Therefore,

Force =mass × (change in speed/time)

Acceleration = 40 m/s ÷ 1.1 millisecond

Acceleration = 40 m/s ÷ 0.001 seconds

Acceleration = 40,000 m/s²

Hence,

F = m × a

F = 0.155 kg × 40,000 m/s²

F = 4,600 kg·m/s² (Newtons)

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