A 20-Kg Mass Attached to a Spring Is Displaced 8

A 2.0-kg mass attached to a spring is displaced 8.0 cm from equilibrium position.It is released and it oscillates with a frequency of 4.0 Hz.What is the speed of the block when it is 6.5 cm from equilibrium? Assume that the surface is frictionless.

A) 1.08 m/s
B) 1.17 m/s
C) 2.11 m/s
D) 3.44 m/s
E) 3.72 m/s

Correct Answer:

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