A 2 kg block slides on a horizontal floor with a speed of 4 m/s. It strikes a uncompressed spring, and compresses it till the block is motionless. The kinetic friction force is 15 N and spring constant is 10,000 N/m. The spring compresses by :

Question

( A ) 2.5 cm
( B ) 8.5 cm
( C ) 5.5 cm
( D ) 11.0 cm