# Momentum final velocity

by mortho
Tags: final, momentum, velocity
 HW Helper P: 6,208 First part is correct. Use the formula $F=\frac{mv-mu}{t}$ where m is mass,v is final velocity and u is the initial velocity and t is time.(Newton's 2nd law) Also remember that velocity is a vector quantity so you should give a direction when you are stating your answers.
 HW Helper P: 6,208 Momentum final velocity $$v=\frac{Ft+mu}{m}$$ $$v=\frac{(4*0.45)+3*-12}{3}$$ is that what you did? which would give you 11.4 ms$^{-1}$ to the left