Unit overview: In this unit we learned about energy and energy transfers in systems. We learned about work and power and 3 types of energies and their respective equations
Key terms and concepts:
- Energy: It what allows us to do work. Examples of this would be
- Systems: A system is the environment in which one must set up to understand energy. Depending on what you include in your system, Energy is either conserved or it is transferred.
- Conservation Energy law: Energy can not be created or destroyed but it can be transferred
- Mechanical total Energy: It is the total energy in a system
- Gravitational Potential Energy: It Energy that is due to height and Earths Gravity : mgh
- Kinetic Energy: It is the energy that is resulted from an object being in motion : 1/2mv^2
- Elastic Energy: It is Energy that is resulted from a spring : 1/2kx^2
- Heating
- Radiation
- Working
- Work
- It is what is needed for energy
- Can be positive and negative
- Must be done in the direction of its displacement
- Is measured in Jules
- W = F//d
- W = FΔx
- W = F d Cosθ
- Power:
- Related to work with time
- It is the rate of Work being done
- P = w/Δt
- P = F v cos Θ
- Work is a force over a distance and energy is the same thing but more so of the ability to do that action and power is work in respect to time . They all relate to motion through energies such as kinetic energy which created only from motion.