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 becomes motionless. The kinetic friction force is 15 N and spring constant is 10000 N/m. the spring compresses by

Q: 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 becomes motionless. The kinetic friction force is 15 N and spring constant is 10000 N/m. the spring compresses by

(a) 5.5 cm

(b) 2.5 cm

(c) 11.0

(d) 8.5 cm

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Ans: (a)