- Could You Please Answer The Questions 1 (130.12 KiB) Viewed 20 times
- Could You Please Answer The Questions 2 (120.12 KiB) Viewed 20 times
Procedure: 1) Click and open the weblink given above. 2) Click and check the "Displacement" and "Natural Length" and "Movable Line". 3) Click and drag the ruler near to the spring as shown in the diagram below to note the natural length (lo) of the spring. (Consider the lowest loop in the spring, where the natural length line, blue dotted line marks.) Ideas from the heart could IPHET-Physics-Mass-Spring! Masses and Springs x + Energy Graph PE Masses and Springs https://phet.colorado.edu/sims/html/mas ... gs_en.html 100 g Mass 50 100 g 300 Spring Constant 1 Small 40 Height 0 m Vectors Energy Lab Large II ☆ Displacement Natural Length ✔Mass Equilibrium Movable Line Period Trace Gravity 0 Earth Damping None 00 Velocity Acceleration Normal Slow 9.8 m/s² 00:00 Lots 仓仓 PHET: 4) Click and drag a 100 g mass and suspend it from the spring. 5) Let the spring oscillate and wait until the mass comes to a stop. 6) Note the new length (I) of the spring. (Notice the "Mass Equilibrium" black dotted line, and move the "Movable Line", red-dotted line to the lowest part of the spring, not the mass.) 7) Draw the FBD (Free-Body Diagram) for the mass-spring system, showing all forces in the space below.
8) Measure the change in length, or the extension of the spring given as x = 1 - 1o. 9) Write down the expression for the spring constant (k) of the spring. Also calculate its value in N/m. (Choose g as 9.8 m/s² for calculations.) k = = 10) Now move the "Movable Line" to the 80 cm mark on the ruler. Also take a note of the equilibrium line (black-dotted). 11) Drag the 100 g mass to the new position (80 cm) mark while holding it. How much work do you do on the spring? You are probably pulling the mass by 10 cm. 12) Now check mark the "Velocity" box. 13) Release the mass and let it oscillate. Notice the velocity vector (green) as to see how it changes in magnitude and direction. 14) Note the Energy Graph with seeing the changes in kinetic energy (KE), PE(gravity), PE(elastic), and E(total). What do you conclude from this? 15) When you pull the mass by 10 cm downward and hold, what is the PE (elastic) stored in the system? 16) When you release the mass, what will be its KE and velocity at the equilibrium position. 17. Write a conclusion for this lab, and indicate (write down) any possible error that you might do that would affect your calculation.