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**1. Homework Statement**

A 2kg particle undergoes simple harmonic motion according to x=1.5sin((pi*t/4) + Pi/6)

A)What is the total mechanical energy of the particle?

B) Shortest time for particle to go from x=.5m to x=-.75m

**2. Homework Equations**

Potential energy=.5kx^2

**3. The Attempt at a Solution**

I don't get what to use for k or x to find the total energy. Please help?

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