Acar accelerates from rest to a velocity of 5 meters/second in 4 seconds. what is its average acceleration over this period of time? a. its acceleration is 1.25 meters/second. b. its acceleration is 5 meters/second. c. its acceleration is 0.8 meters/second. d. its acceleration is 1.25 meters/second2. e. its acceleration is 20 meters.

The average acceleration is

The acceleration of the car is  .

Explanation:

It is given that,

Initial speed of the car, u = 0

Final speed of the car, v = 5 m/s

Time, t = 4 s

We need to find the average acceleration over this period of time. It is given by the rate of change of velocity. It is given by :

So, the acceleration of the car is  . Hence, the correct option is (D).

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