While Calvin is doing a physics experiment outside with a radar gun, he notices that after three seconds a car reaches a speed of 20 m/s while accelerating at 3 m/s squared. what was the initial velocity of the car?

The initial velocity of the car is 11 m/s.

Explanation:

Final velocity, v = 20 m/s

acceleration of the care, a = 2 m/

time, t = 3 s

Initial velocity, u = ?

once you substitute all these vales, you will get u = 11 m/s

think its the third option

the answer is b, have negligible mass