JEE Main 2025 Physics question

A block of mass 1 kg, moving along x with speed 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 N, with k = 10 N/m. Then the final speed of the block as it crosses rough region is.

• (1)6 m/s
• (2)10 m/s
• (3)4 m/s
• (4)8 m/sCorrect