2.1 & 2.2 Review: Mechanical, potential, and kinetic energy
Use this image to answer the questions below. At what point is the kinetic energy the highest? A B C At what point is the energy equally split between kinetic and potential energy? A B C At what point is the potential energy the highest? A B C At point A the mechanical energy is 100% Potential energy and 0% kinetic energy. As it moves towards point C, the energy is transferring from potential to kinetic energy. At point C, there is almost no potential energy but the kinetic energy is at it's highest point. As it moves upwards towards point B, the pendulum will slow down as the kinetic energy transfers into potential energy again. At point B, the energy is about 50% kinetic and 50% potential. When the pendulum gets back to the other point A, it will stop for just a moment before moving down again. Mechanical energy equals the potential energy of an object plus it's kinetic energy. When potential energy is high, kinetic energy will be low. Since energy is not created or destroyed, if the potential energy is 60%, you can predict that the kinetic energy would be close to 40%. If energy can not be destroyed, why do objects in motion usually slow down on earth?