A 2kg block with initial speed 5m/s encounters a force F\=−1xN from x\=0.5m to x\=2.5m. What is the final speed?
Initial K=12×2×52=25J. 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 J as the result, so option A is correct.
Ref: NCERT Class 11 Physics > Chapter 3: Motion in a Straight Line > Topic: Straight Line Motion - Practice Set0