Practice question
Question
A train accelerates uniformly from 20m/s to 40m/s in 10s. What is the distance covered?
Explanation
Find a=v−v0t=40−2010=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 300 m as the result, so option D is correct.