A car speeds up uniformly from 5 m/s to 25 m/s in 4 s. What is its acceleration?
Correct answer A. 5 m/s²
Explanation
a = (v_f − v_i)/t = (25 − 5)/4 = 20/4 = 5 m/s². Dividing the final speed alone by time gives the wrong 6.25 m/s².
Answer checked How we write and check questions
Discussion