Question

Computer simulations can help in visualising physical quantities that are difficult to observe directly. The PhET simulations (https:// phet.colorado.edu) provide interactive models, such as Energy Skate Park, Energy Forms and Changes, Pendulum Lab, and Masses and Springs. Use these to explore how different forms of energy change as parameters, such as mass, height and friction are varied.

Answer 1

In the Energy Skate Park simulation, observe how the kinetic energy (KE) and potential energy (PE) bars exchange as the skater moves up and down while the total energy remains constant. When friction is introduced, the total mechanical energy gradually decreases as thermal energy increases. Adjusting the skater's mass and height changes the energy values, demonstrating the equations KE = ½mv² and PE = mgh.