A complete description of simple harmonic motion must take into account several physical quantities and various mathematical relations among them. This information is needed to solve oscillation problems of this type Determine the velocity at t=0.40s. Express your answer in meters per second to two significant figures. View Available Hint(s) vx = m m/s Submit Part B Assume that the oscillating mass described in Part A is attached to a spring. What would the spring constant k of this spring be? Express your answer in newtons per meter to two significant figures. View Available Hint(s) k = m N/m Submit Part C What is the total energy E of the mass described in the previous parts? Express your answer in joules to two significant figures. View Available Hint(s) E = m J