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A mass on a spring is undergoing simple harmonic motion with a frequency of 0.25 Hz. At time t : 0 it is at the equilibrium point. What is the earh'est next time when the mass will be the furthest in distance from the equilibrium point? (10 pts) A 6.3 kg block is attached to a spring and undergoes simple harmonic motion on a horizontal frictionless surface. The total energy of the springblock system is 98.0 J . When the displacement of the block from equilibrium is half the amplitude, what is the block's velocity? (10 pts)