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If the book is initially at rest, what is its speed after it has traveled 0.400 m up the wall?

If the book is initially at rest, what is its speed after it has traveled 0.400 m up the wall? class=

Verified Answer :

syed514

Here are the equations i got out of that FBD :
∑Fx=N−Fcos(60)=0
∑Fy=fk+Fsin(60)=ma

I know that fk=μ(Fcos(60))
 find acceleration and then plug it in the kinematics equationv^2f=v^2i+2∗a∗d

where inital velocity is 0


Net force along y-axis is Fsin60−fk−mg=ma


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