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A 2.0 kg mass is attached to a spring which is hooked to a wall. The...

A 2.0 kg mass is attached to a spring which is hooked to a wall. The mass undergoes horizontal oscillations between 25 to 65 cm from the wall. The spring constant is 32 N/m. The spring is compressed and then released so it is at maximum displacement when .  Hint: Use the information to write equations for the x-position, x-velocity and x-acceleration as a function of time first and then evaluate at the time given.

a. What is the x position at t = 0.9 s? Answer in cm.

b. What is the x-velocity at t = 0.8 s? Answer in m/s.

c. What is the x-acceleration at t = 1.2 s? Answer in m/s2.

d. What is the total mechanical energy in joules?

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