Physics

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A spring id vertically, as shown below, and a 500g mass is hung from its lower end. The EQUILIBRIUM extension of the spring is observed to be 10.0cm.
(1) What is the spring constant of the spring?
A: 49N/m
(B) If the is pulled down by 5.00cm and released, what is the frequency of the subsequent oscillations.
A: 1.58
(C) What ist he velocity of the mass at time t=2.5 sec?
(D) What is the acceleration of the mass at time t=4.75 sec?
(E) What is the net force acting on the mass at time t=5.0sec?
(F) What are the potential and kinetic energies of the mass when the displacement 7 =-1.5cm?

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