A block of mass 0.45 kg can slide over a frictionless horizontal surface. It is attached to a spring whose stiffness constant is k = 18 N/m. The block is pulled 38 cm and let go.

a)What is its maximum speed?
b)What is its speed when the extension is 30 cm?
c)At what position is the kinetic energy equal to the potential energy?

1 answer

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