Turn off the gravity. Keep the spring constant at the default setting. Slow down the simulation. Click on the Displacement/Natural Length and the Movable Line buttons. Position the movable line 20 cm below the natural length line. Q1. Click on the Velocity. Attach the 50 g mass on the 1# spring very slowly. Then, pull the center of the hook of the 50 g weight down to the movable line and release the weight. Observe and explain the relationship between displacement and velocity arrows with the help of the equations of simple harmonic motion (SHM). Q2. Double the spring constant. How does the maximum velocity change? How does the maximum displacement change? Explain what you observe using equations of SHM. Q3. Reset the spring constant to its default value. Unclick the Velocity and click on the Acceleration. Re-start the oscillation using the setting on Q1. Observe and explain the relationship between displacement and acceleration vectors using the equations for simple harmonic motion (SHM). Q4. Double the spring constant. How does the maximum acceleration change? Explain what you observe using equations of SHM