A 0.38-kg block rests on a level surface and is attached to a horizontally aligned spring with a spring constant of 55.0 N/m.The block is initially displaced 4.8 cm from the equilibrium point and then released to set up a simple harmonic motion.A frictional force of 0.50 N exists between the block and surface.What is the speed of the block when it passes through the equilibrium point after being released from the 4.8-cm displacement point?
A)0.21 m/s
B)0.32 m/s
C)0.64 m/s
D)0.46 m/s
E)1.8 m/s

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The Answer of A 0.38-kg block rests on a level surface and is attached to a horizontally aligned spring with a spring constant of 55.0 N/m.The block is initially displaced 4.8 cm from the equilibrium point and then released to set up a simple harmonic motion.A frictional force of 0.50 N exists between the block and surface.What is the speed of the block when it passes through the equilibrium point after being released from the 4.8-cm displacement point?
A)0.21 m/s
B)0.32 m/s
C)0.64 m/s
D)0.46 m/s
E)1.8 m/s

A 038-Kg Block Rests on a Level Surface and Is Attached