please be clear explaining and using formulas. i got part A and B but dont know

Question

please be clear explaining and using formulas. i got part A and B but dont know how to get C!!

A block of mass 5.00 kg is projected up a ramp with an initial speed v0 = 16.0 m/s. The ramp is inclined at 36.9degree above the horizontal and the coefficient of kinetic friction between the block and the ramp is muk = 0.300. What is the magnitude of the friction force that acts on the block? Ans. 11.8 N What is the magnitude of the acceleration of the block? Ans. 8.23 m/s2 What is the maximum distance the block travels along the incline before it starts to slide back down? Ans. 15.6m

Explanation / Answer

acceelartion = -8.23 m/s^2

u = 16 m/s

v^2 = u^2 - 2as

s = u^2/2a = 15.55 m

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