# Physics

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A 10kg particle undergoes simple harmonic motion with an amplitude of 2.0mm, a maximum acceleration of 8.0x10^3 m/s^2, and an unknown phase constant (phi) What are:
a.) the period of the motion
b.) the maximum speed of the particle
c.) total mechanical energy of the oscillator

What is the magnitude of the force on the particle when the particle is at:
d.) its maximum displacement
e.) half its maximum displacement

I have the answers from the back of the book, but I don't know which equations to use! Any help would be very appreciated!

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