A runner starts from rest and runs a distance of 100 m in 10.0 s.What is his average acceleration in m/s²? A)9.81 B)1.40 C)2.00 D)98.6 E)3.50

Question

Quizplus · Accepted Answer

Average acceleration = (final velocity - initial velocity)/time taken
As the runner starts from rest, the initial velocity is 0 m/s. 
Final velocity = distance/time taken = 100m/10.0s = 10 m/s 
Therefore, average acceleration = (10 m/s - 0 m/s)/10.0 s = 1 m/s^2
The option closest to this value is C, 2.00 m/s^2. Therefore, C is the best choice.

A Runner Starts from Rest and Runs a Distance of 100