I've tried to use Newton's second law to determine the deceleration generated by the resisting friction force.
Then using kinematic equations to solve for the initial velocity - 0.711m/s2.
Would you have another in mind?
Okay, thank you for the insight.
I'm not sure as to how to use momentum to solve the problem when the velocity of the arrow or the target is not given in the question tbh.
I assumed that the kinetic energy from the arrow would be used to penetrate the block and move the block.
I saw a similar method performed in a similar question in the link below (Hint 3 - Eqn (3)).
https://physicstasks.eu/1994/bullet
I apologize.
I tried to solve by using the conservation of energy where I had the kinetic energy of the arrow before impact equal the work required to penetrate the arrow (F . x1) & move the block (F . x2).
Then I tried to arrange the expression and solve the velocity of the arrow although I...