Question

A car traveling at a speed of 24 m/s comes to a stop at a red light.

How much time will it take for the car to stop if its acceleration is –8.0 m/s2?

3 s
16 s
32 s
192 s

Answer 1

Use v = v0 + a t. With v = 0, 0 = 24 + (−8.0) t → t = 24/8.0 = 3 s.

Answer: 3 s.