A particle P is moving on the x axis and its acceleration a ms-,t seconds after a given instant, is given by a = 6t - 18 The particle is initially at the origin O, moving with a speed of 15 m/s in the positive x direction. Determine the times when P is instantaneously at rest (v=0m/s). a. t = ls, 5s Ob.t=3s, 7s O c. t=2s, 5s Od. t = 2s, 4s O e.t=1s, 7s

A particle P is moving on the x axis and its acceleration a ms-,t seconds after a given instant, is given by a = 6t - 18 The particle is initially at the origin O, moving with a speed of 15 m/s in the positive x direction. Determine the times when P is instantaneously at rest (v=0m/s). a. t = ls, 5s Ob.t=3s, 7s O c. t=2s, 5s Od. t = 2s, 4s O e.t=1s, 7s