Answers by visitors named: D. Martin Physics

-->J = Impulse = F * t = change in momentum --> Units for Impulse can be N*s or kg*m/s --> p = momentum = m * v units are kg*m/s --> East is +, West is - The change in momentum is = m(v final- v initial) Impulse = F * t so... m(v final- v initial) = F * t (2kg * v final) - (2kg * 4 m/s) = -[6N * 2s] (2kg*v) - 8 kg m/s = -12 kg m/s +8 kg m/s +8 kg m/s (2kg*v) =-4 kg m/s v= -2 m/s (the negative signifies West) Answer=2 m/s West