The displacement x and time t for a particle are related to each other as : t = √x + 3. What is the work done in first six seconds of its motion?

Q: The displacement x and time t for a particle are related to each other as : t = √x + 3. What is the work done in first six seconds of its motion?

(a) 6 J

(b) 4 J

(c) 2J

(d) Zero

Ans: (d)