1.2 1.3 A mass of 1,5 kg hung on a light vertical spring stretches it 0,4 m. The mass is then pulled down 1 m and released. 1.2.1 Find the position and velocity of the mass at any time if a damping force numerically equal to 15 times the instantaneous speed is acting. Use g = 10 m s-². 4 1.2.2 State the nature of the damping and illustrate it graphically. Derive the equation for the conservation of total energy of a simple harmonic oscillator.

1.2 1.3 A mass of 1,5 kg hung on a light vertical spring stretches it 0,4 m. The mass is then pulled down 1 m and released. 1.2.1 Find the position and velocity of the mass at any time if a damping force numerically equal to 15 times the instantaneous speed is acting. Use g = 10 m s-². 4 1.2.2 State the nature of the damping and illustrate it graphically. Derive the equation for the conservation of total energy of a simple harmonic oscillator.