📝 Review Of Terminology In Rectilinear Motion

Q1. A particle moves along the x‑axis with position function \(s(t)=4t^{2}-3t+2\). What is the particle's instantaneous velocity at \(t=2\) seconds?

💡 Difficulty: easy | ✅ Correct: B

Q2. A particle moves from \(x= -3\) m to \(x=7\) m in 5 s. Which quantity represents its average speed?

💡 Difficulty: medium | ✅ Correct: C

Q3. A particle’s position is given by \(x(t)=t^{3}-6t^{2}+9t\). At what time(s) does the particle have zero acceleration?

💡 Difficulty: hard | ✅ Correct: A