During a race, a runner runs at a speed of 6 m/s. 2 seconds later, she is running at a speed of 10 m/s. What is the runner’s acceleration? Show your work.
v o = 6 m/s, t = 2 s v = 10 m/s v = v o + a t a t = v - v o a = ( v - v o ) / t a = ( 10 m/s - 6 m/s ) / 2 s = 4 m/s / 2 s = 2 m/s² Answer: The runner`s acceleration is 2 m/s².
