1 point A car is travelling at 9.2 m/s and accelerates at 3.49 m/s2 for 5.3 s. Final
velocity?
30.6 m/s
17.4 m/s
36.0 m/s
27.7 m/s
17.5 m/s

27.7 m/s

Explanation:

v = u + at

Initial velocity u = 9.2 m/s

Acceleration a = 3.49 m/s²

Time t = 5.3 s

Final Velocity v = ?

v = 9.2 + 3.49 (5.3)

v = 27.7 m/s

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