Practice question
Question
A body moving at 15m/s decelerates uniformly to rest in 5s. What is the distance covered?
Explanation
Find a=v−v0t=0−155=−3m/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 25 m as the result, so option A is correct.