Engineering Dynamics · Work-energy and impulse-momentum
A 2.8 kg block is pressed against a vertical wall by a horizontal spring of stiffness…
Problem
A 2.8 kg block is pressed against a vertical wall by a horizontal spring of stiffness 900 N/m. The spring is compressed 60 mm from its unstretched length and the block is released from rest. The kinetic friction coefficient between block and wall is 0.35. Determine the speed of the block after it has moved 40 mm down the wall, while remaining in contact with the wall. Assume the spring remains horizontal.
Hint
A horizontal spring does no work on a vertical displacement if its compression does not change.
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