Description Springs and Energy PhET Sim Part 1: Finding the Spring Constant k 1. Go to the "Lab" tab and hit the yellow

[answerhappygod]

Description Springs And Energy Phet Sim Part 1 Finding The Spring Constant K 1 Go To The Lab Tab And Hit The Yellow 1 (63.32 KiB) Viewed 18 times

Description Springs And Energy Phet Sim Part 1 Finding The Spring Constant K 1 Go To The Lab Tab And Hit The Yellow 2 (71.94 KiB) Viewed 18 times

Description Springs And Energy Phet Sim Part 1 Finding The Spring Constant K 1 Go To The Lab Tab And Hit The Yellow 3 (76.03 KiB) Viewed 18 times

Description Springs and Energy PhET Sim Part 1: Finding the Spring Constant k 1. Go to the "Lab" tab and hit the yellow reset button in the bottom right. 2. Turn on the "Displacement/Natural Length" and "Mass Equilibrium" indicators. 3. Place the 100g mass on the spring, and press the red stop sign button to set the spring at equilibrium. o The mass should be centered on the black dotted line! 4. Measure and record the length of the thin green displacement vector. o In our spring potential (elastic potential) and Hooke's law equations, this displacement vector would be "x". o Use the ruler for this measurement! o #1: What is your measured displacement? 5. Use the mass, g, and displacement to compute the spring constant k. o Reminders: FG=mg and Fs=kx o You will need to use Newton's second law. 6. Repeat steps 3-5 with two other masses, for a total of 3 runs. • Use the slider up top to change the value of the known mass. • #2: Record each computation of k in a data table.
7. Average your k values to find the average spring constant. o #3: What is your average spring constant? Part 2: Finding the Velocity Scale 1. Hit the yellow reset button. 2. Turn on the "Displacement/Natural Length," "Mass Equilibrium," and "Velocity" indicators. 3. Turn off damping. 4. Place the 100g mass on the spring. 5. Press "Pause" in the bottom right corner. o Optionally select the "slow" speed to make things easier on the eyes. 6. Pull the mass down some distance. 7. While still paused, use the ruler tool to measure the height (h) and displacement (x). o The height should be measured from the "Height = 0" line to some point on the mass. Anywhere works, just be consistent and use the same point on the mass every time. o The displacement is measured by simply measuring the length of the thin green displacement vector. o From now on, do not grab the mass and
8. Use these values to compute total energy. • Reminder: ETot-GPE+SPE+KE and GPE = mgh, SPE = 0.5kx², KE = 0.5mv² o #4: What is the total energy at this point in time? 9. Now press play! Pause at some point later in time o #5: Measure and record the height (h), displacement (x), and velocity vector length (L) in a table. 10. Repeat step 9 four more times for a total of 5 trials. 11. Use the total energy from Q4 as well as the measured values from step 9 to compute the kinetic energy (KE), the velocity (v), and the velocity scale (S=v/L) for each trial. o These calculations can be added as extra columns on your data table, or they can be placed in their own calculations table. o #6: Make sure all of these calculations are visible and clearly presented. 12. Average your scales and report the average scale Savg. o #7: What is your average scale in units of m/s per cm of ruler?