Problem: The initial velocity of block A is 9m/s. Knowing that uk=.3 Determine the time for the block to reach zero velocity. When (theta)=20 deg. Here is my work so far. mv_1+Imp_1,2=mv_2 Imp_1,2=Ff(t)+sin(theta)W(t) Ff=Cos(theta)uk(mg) W=mg Imp=9.81cos(20).3m+9.81sin(20)m Imp=6.12mt 9m+6.12mt=0 t=1.47s This answer is Wrong It Should Be .963s What Have I Missed?