Question: A 4 0 0 g block is placed in front of a horizontal 3 0 0 0 N / m spring compressed 8 cm .

A 400 g block is placed in front of a horizontal 3000 N/m spring
compressed 8 cm. The spring is released and the block slides along a
second horizontal surface with an unknown coefficient of friction. After
the block slides a distance of xAB =7 m it is moving at 4.5 m/s.
a) Calculate the coefficient of friction between the block and surface AB
b) Calculate the total distance the blocks slides before coming to a stop

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