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## Homework Statement

The position of a 50 g oscillating mass is given by x(t)=(2.0cm)cos(10t−π/4), where t is in s. If necessary, round your answers to three significant figures. Determine: The total energy.

## Homework Equations

T = 2π/w

T = 2π√m/k

1/2kA^2

1/2mv^2

1/2kx^2

## The Attempt at a Solution

T = 2π/10 = 0.6283s

k = 0.5kg / (0.6823/2π)^2 = 5.000N/m

1/2kA^2 = 0.5(5)(0.02)^2 = 0.001J