Energy Transformations and Kinematics

These flashcards cover key concepts related to energy transformations, types of energy, conservation of energy, and calculations of kinetic energy based on provided lecture notes.

What is the key principle of energy transformations in motion?

Potential energy can transform into kinetic energy and vice versa when a force changes the motion.

What are the forms of potential energy mentioned?

1. Gravitational potential (gravity/height), 2. Chemical (breaking and rearranging molecules), 3. Elastic (stretch), 4. Nuclear (atoms splitting).

What is the formula for kinetic energy (KE)?

E = (1/2 mv²), where m is mass and v is velocity.

What does the law of conservation of energy state?

Energy can neither be created nor destroyed; it is recycled throughout the universe.

What is the difference between energy efficiency and regular energy use?

Energy efficient means most of the energy used is working towards its intended purpose, unlike in less efficient systems.

What two variables affect the magnitude of kinetic energy?

Speed (or velocity) and mass.

What type of energy does a flowing stream provide to a turbine?

Kinetic energy.

How does mechanical energy relate to energy cycling?

Mechanical energy (kinetic and potential) is cycled to make things spin.

How is electrical energy related to the energy transformation system?

Electrical energy is a type of energy in the transformation system that works together with other energies to accomplish tasks.

What is the significance of an incandescent light bulb in terms of energy efficiency?

An incandescent light bulb is less energy efficient compared to modern lighting solutions, wasting more energy as heat.