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?
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