A car is decelerating at the rate of 2 km/s². If its initial speed is 66 km/s, how long will it take the car to come to a complete stop? A) 3.3 s. B) 132 s. C) 33 s. D) 330 s.

Question

Quizplus · Accepted Answer

Using the formula, Vf = Vi + at, where Vf = 0 (final speed), Vi = 66 km/s (initial speed), a = -2 km/s^2 (deceleration), and t is the time taken to come to a complete stop.
0 = 66 - 2t
2t = 66
t = 33 seconds. Therefore the answer is C.

A Car Is Decelerating at the Rate of 2 Km/s2

A Car Is Decelerating at the Rate of 2 Km/s²