Conservation of Energy Flashcards
What is Energy?
Energy is the capacity to do work
Principle of Conservation of Energy
- is close system, isolated from its surroundings, the total energy of the system is (a)_____________.
- Energy cannot be created or destroyed, only can (b)____________ or (c)__________.
a. conserved
b. transform
c. transfer
Application in 3 Condition of Law in Conservation of Energy
a. Free Fall
b. Spring
c. Pendulum
These forces cause energy to be converted into forms that cannot be easily regained
-works depend on the path taken
Non-conservative forces (e.g. Friction, Air & Water Resistance)
These forces cause energy to converted into forms that can be easily regained.
-Work does not depends on the path taken
Conservative Forces (e.g. Gravity, Spring, Electronic Forces)
is the energy that is possessed by an object due to its motion or due to its position.
Mechanical Energy
It can be either kinetic energy (energy
of motion ) or potential energy ( stored energy of position )
Mechanical Energy
Energy that lies at the level of atoms and does not affect motion on a scale
Non-Mechanical Energy
Atoms and molecules are constantly in motion so they have kinetic energy, but we cannot see it. Such kinetic energy is not mechanical by nature
Non-Mechanical Energy
Kinetic energy can be transferred to particles through collision. Elastic collision preserves the total mechanical energy of the system
Non-Mechanical Energy
The average kinetic energy of particles in an object increase as the object gets hotter and decreases as it
cools down
Non-Mechanical Energy
Give an Example of Non-Mechanical Energy
Heat Energy Light Energy Chemical Energy Electrical Energy Nuclear Energy Sound Energy
A change in forms form one form to another forms of energy is called ____________ or ________________
Energy Conversion or Energy Transformation
Sometimes, one form of energy needs to
be transformed into another to get work
done
Single Transformation
Often, a series of energy transformations is needed to do work
Multi-transformations
