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

Question

asked Mar 21, 2019 233k views

2 Answers

Jason Glez · Answer 1 · 2019-03-25T16:14:15+0000

Answer;

3 seconds

Explanation;

Acceleration is the rate of change in linear velocity.

Acceleration = (final velocity -initial velocity) /time

In this case;

Final velocity = 0 m/s (because the car is going to rest by stopping)

Initial velocity = 24 m/s

Acceleration = -8.0 m/s²

Thus; - 8.0 m/s² = (0-24 m/s)/ t

time = (-24 m/s)/-8.0 m/s²

= 3 seconds