Practice question
Question
A train accelerates uniformly from 8m/s to 20m/s in 6s. What is the distance covered?
Explanation
Find a=v−v0t=20−86=2m/s2. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives 84 m as the result, so option D is correct.