A given spring stretches 0.1m when a force of 20N pulls on it . A 2 kg block attached to  it on a frictionless surface pulled on the right 0.2 m and released .

a.  What is the frequency of oscillation of block?

b.  what is the velocity of the midpoint ?

c.  what is its acceleration at either end?

d.  what is the acceleration and velocity when x=0.12m on the block’s first passing this point?

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