A 780-g mass is attached to a vertical spring and lowered slowly until the mass rests at its equilibrium position 30 cm below the original length of the spring. It is then set into simple harmonic motion. (a) What is the frequency and period of the oscillation? (b) What is the maximum velocity of the oscillating mass? Where does the maximum velocity occur? (c) What is the maximum acceleration of the oscillating mass? Where does the maximum acceleration occur? (d) Draw a diagram showing how the total energy of the oscillating system changes with time. Can someone get me off to a start here? I don't understand how to find the frequency without knowing Lamda or angular frequence (w)..