In motion with constant acceleration in a plane, what happens if the acceleration is opposite to the initial velocity?
If the acceleration is opposite to the initial velocity, the object slows down, reverses direction, and then accelerates in the direction of the acceleration along a straight line. The path remains linear but with a change in direction. 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 The object slows, reverses, and accelerates as the result, so option D is correct.
Ref: NCERT Class 11 Physics > Chapter 3: Motion in a Straight Line > Topic: Acceleration and Velocity Analysis - Part 8