Name: eSupport Date: Name: Masses and Springs 5. Draw all the energies at the following points: E EEEE EEEEE & E ELEE Energy https://phet.colorado.edu/sims/html/masses-and-springs/latest/masses-and-springs_en.html at the top Set MASS to maximum (300 g) half way down at the bottom Set DAMPING (friction) to ZERO . Hit SLOW on the bottom if it helps. We will be working with the following energies . 6. When the spring gets to the top, Make mass HALF as big. What happens to all your energies? Kinetic (KE)- energy while MOVING Potential from gravity (PEgrav) -energy with HEIGHT Elastic potential (PEelas) -Energy due to SPRING/band 7. Put damping (friction) on. What changes in your energy bars and what eventually happens to the mass and spring? Thermal (Etherm) -Energy lost to FRICTION (heat, internal) circle the following answers 8. Think of the forces acting on the mass. What is the force pulling the mass and thus the spring down to stretch it? 1. Where is KE (kinetic) the highest: Bottom Middle TOP 2. Where is PEgrav (potential from gravity) the highest: 1. IN BOTH LABS: Bottom Middle TOP a. What happened between kinetic and potential energies as the object moved? 3. Where is PEelas (elastic) the highest: Bottom Middle TOP b. Did the total energy change as the object moved back and forth? 4. Does the total ever change? c. What did Friction do similarly in both labs? 9 YES