A 0.20-kg block rests on a frictionless level surface and is attached to a horizontally aligned spring with a spring constant of 40 N/m.The block is initially displaced 4.0 cm from the equilibrium point and then released to set up a simple harmonic motion.What is the speed of the block when it passes through the equilibrium point?
A)2.1 m/s
B)1.6 m/s
C)1.1 m/s
D)0.57 m/s

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The Answer of A 0.20-kg block rests on a frictionless level surface and is attached to a horizontally aligned spring with a spring constant of 40 N/m.The block is initially displaced 4.0 cm from the equilibrium point and then released to set up a simple harmonic motion.What is the speed of the block when it passes through the equilibrium point?
A)2.1 m/s
B)1.6 m/s
C)1.1 m/s
D)0.57 m/s

A 020-Kg Block Rests on a Frictionless Level Surface and Is