A car is traveling north at 17.7m/s. After 12 s its velocity is 14.1 m/s. In the same direction.Find the magnitude and direction of the car's average acceleration. A)0.30 m/s²,south B)2.7 m/s²,south C)0.30 m/s²,north D)2.7 m/s²,north

Question

Quizplus · Accepted Answer

The car's velocity is decreasing, so its acceleration is in the opposite direction of its velocity, which is south. The magnitude of the acceleration is:a = (v_f - v_i) / t = (14.1 m/s - 17.7 m/s) / 12 s = -0.30 m/s^2The negative sign indicates that the acceleration is in the south direction.

A Car Is Traveling North at 17