. We see that the acceleration is positive, and so we know that the velocity is increasing. A particle originally located at the origin has an acceleration of a 3j ms 2 and an initial velocity of v 0 5i ms. A particle initially located at the origin has a constant acceleration of a 3. 00 ms2 (a) Find the vector position of the particle at any time t (where t is measured in seconds) t2 j) m ti (b) Find the velocity of the particle at any time t. A particle initially located at the origin has an acceleration of vector a 1. . We see that the acceleration is positive, and so we know that the velocity is increasing. Find (a) the charge on each particle and (b) the mass of particle 2. . This being an idealistic case, we also have studied a quasi-perpendicular shock, where the ambient magnetic field forms a 75 angle with the propagation direction. 00 j ms2 and an initial velocity of v i 5. acceleration when t 1s.