Other Forms of Energy

1. Mechanical ENERGY The sum of the potential energy and the kinetic energy in a system The amount of work an object can do because of the object’s kinetic and potential energies *** If something has mechanical energy you can see it move (or you would see it move if it only has potential energy)

2. Non-mechanical ENERGY Energy that lies at the level of atoms and does not affect motion on a large scale Example: apples give you energy when you eat them Atoms and molecules are constantly in motion so they have kinetic energy The kinetic energy is transferred through the particles through collisions Average kinetic energy of particles in an object increases as the object gets hotter and decreases as it cools down

***Nonmechanical energy can be heat energy, light energy (electromagnetic), chemical energy, or nuclear energy. Once again, you CANNOT SEE nonmechanical energy*

Which of the following is a measure of the ability to do work? 1.Power 2.Energy 3.Photosynthesis 4.Joules

Which of the following does a flying Frisbee have the most of? 1.Mechanical potential energy 2.Non-mechanical potential energy 3.Mechanical kinetic energy 4.Non-mechanical kinetic energy

Which of the following best describes the motion of the atoms in a cup of hot chocolate? 1.Mechanical potential energy 2.Non-mechanical potential energy 3.Mechanical kinetic energy 4.Non-mechanical kinetic energy

Which of the following best describes a wound up clock spring? 1.Mechanical potential energy 2.Non-mechanical potential energy 3.Mechanical kinetic energy 4.Non-mechanical kinetic energy

Which of the following best describes a clock spring unwinding? 1.Mechanical potential energy 2.Non-mechanical potential energy 3.Mechanical kinetic energy 4.Non-mechanical kinetic energy

Which of the following best describes a skateboarder sitting at the top of a hill? 1.Mechanical potential energy 2.Non-mechanical potential energy 3.Mechanical kinetic energy 4.Non-mechanical kinetic energy

Which of the following best describes the energy within the bonds between the atoms in a bowl of cereal? 1.Mechanical potential energy 2.Non-mechanical potential energy 3.Mechanical kinetic energy 4.Non-mechanical kinetic energy

A boulder has 600 J of PE. Ignoring air resistance, approximately how much KE does it have right before it hits the ground?