A large mass bobs up and down on a heavy spring. At first, it is seen moving up with a maximum velocity of 47 cm/s. When it is 8.7 cm above the central position, its speed is half its maximum value.

What are the amplitude, and angular frequency  for this motion?
A = w =
    A. 0.50 p rad s -1
    B. 0.75 p rad s -1
    C. 1.0 p rad s -1
    D. 1.5 p rad s -1
    E. 2.0 p rad s -1 


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