A particle starts from rest with an acceleration of (5i^−2j^)m/s2. What is its displacement magnitude after 3s?
Displacement r=12at2 (since v0=0). 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 20 m as the result, so option A is correct.
Ref: NCERT Class 11 Physics > Chapter 3: Motion in a Straight Line > Topic: Motion Parameters and Calculations