Question Detail
Question
The coordinate of a particle in meters is given by x(t) = 16t - 3.0t³, where the time t is in seconds. The particle is momentarily at rest at t =
Correct Answer
Option B is the correct answer.
Detailed Explanation
Velocity v(t) = dx/dt = 16 - 9t². Set v=0 => 16 - 9t² = 0 => t² = 16/9 => t = 4/3 = 1.33 s ≈ 1.3 s.
Hint
Differentiate position to get velocity, then set to zero.