A Particle Moving Along the X Axis Has a Position

Multiple Choice

A particle moving along the x axis has a position given by x = (24t - 2.0t3) m, where t is measured in s. What is the magnitude of the acceleration of the particle at the instant when its velocity is zero?

A) 24 m/s2
B) zero
C) 12 m/s2
D) 48 m/s2
E) 36 m/s2