Work, Power and EnergyEasy
Question
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
Options
A.5.5 cm
B.2.5 cm
C.11.0 cm
D.8.5 cm
Solution
K.E. = μmg x + 1/2.k.x2 (μmg x <<< 1/2k x2)
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