The particle starts from rest at t=0. what is the magnitude p of the momentum of the particle at time t? assume that t>0.

U want models on the lots. I will anticipate that's µg. However truely the models cancel out, so so long as they're consistant, that is ok. Exchange in momentum is 1µg x 5e7 + 1µg x zero. 9 x 5e7 ∆P = 1µg x 5e7 (1+zero. 9) = 50 (1.9) gm/s imparted to the gold, that is ∆P = 50 (1.9) = 197µg x V V = 482000 m/s.