A block of mass 2.0 kg is given an initial speed along the floor towards a spring as shown. The coefficient of kinetic friction between the floor and the block is 0.4 and force constant of the spring is `5.6xx10^(3)` N/m. The block compresses the spring by 10cm before it stops for a moment. What is the initial speed (m/s) of the block?

Options

A. 3.6 m/s
B. 4.7 m/s
C. 4.0 m/s
D. 6.0 m/s

Answer

A