Practice question
Question
A person walks 12m in 3s and then walks back 6m in 2s. What is the average speed?
Explanation
Average speed = total distance / total time. 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 3 m/s as the result, so option A is correct.