Work, Energy and Power: JEE Main 2025 Physics question

A block of mass 1 kg, moving along $x$ with speed $v_i = 10$ m/s enters a rough region ranging from $x = 0.1$ m to $x = 1.9$ m. The retarding force acting on the block in this range is $F_r = -kx$ N, with k = 10 N/m. Then the final speed of the block as it crosses rough region is.