4.1 The Nature of Energy Flashcards
What is energy?
energy is the ability to cause change
What are the different forms of energy?
electrical, chemical, radiant, thermal
Energy has….(-) forms and (-) types
four different forms, two different types
The two different types of energy are…
kinetic and potential
What is kinetic energy?
the energy a moving object has because of its motion
What does kinetic energy depend on?
the object’s mass and speed
What unit is energy measured in?
joules
Kinetic energy equation?
KE=(1/2)mv^2
What is the SI unit of energy?
joule (J)
What is mass measured in?
in kg
What is velocity measured in?
m/s^2
What is potential energy?
energy stored in a motionless object
Potential energy equation?
hmacceleration due to gravity
What does potential energy have the capability to do?
ability to transform into kinetic energy
What is elastic potential energy?
energy that is stored in something that can stretch or compress, such as a rubber band or a spring
Where is chemical potential energy stored?
in the chemical bonds between atoms
Bond names
ane (1), ene (2), yne(3)
What causes chemical energy to be released?
the breaking of bonds
Energy stored in chemical bonds is known as…
chemical potential energy
Example of a combustion reaction
C3H8 + O2 = CO2 + H20
Gravitational potential energy (GPE) is…
energy stored by objects due to their position above earth’s surface
What has GPE?
anything that can fall
GPE equation?
mgh (massacceleration due to gravityheight)
What is acceleration due to gravity measured in?
m/s^2 and has the symbol g
