Equations
M= 36,000
H=20
GPE= ?
A= 9.8 m/s
GPE= 7,056,000 J
What is energy?
The ability to change
Define potential energy
Stored energy
Define thermal energy
The sum of kinetic and potential energy of the particles in an object
What is kinetic energy measured in?
Joules (J)
An object has a kinetic energy of 25 J and a mass of 34 kg, how fast is the object moving?
v=1.28 m/s
Define law of conservation of energy
Energy can never be created or destroyed, it can only change forms
What is the equation used?
PE=HAM
How does thermal energy flow?
From higher temp objects to lower temp objects
What equation is used?
KE=1/2m(v2)
KE = ½ mv2
KE = 140J
m = ?
v = 21m/s
M=0.63 kg
Define elastic potential energy
Energy stored in objects being compressed or streched
Elastic, Chemical, and Gravitational
What is heats abbreviation?
Q
What does one joule(J) equal?
1 kg * m/s
What is the Kinetic Energy of a 100 kg object that is moving with a speed of 12.5 m/s?
KE= 7,812.5 J
Define gravitational energy
Energy stored in objects that are above earths surface
Do you have potential energy when running?
No
Define heat
The transer of energy from one object to another
What is mass measured in?
kg
What is the kinetic energy of an object with a mass of 6.25×104g having a speed of 26.3 m/s?
21.6 kJ.
Define kinetic energy
energy is motion
How is potential energy different from kinetic?
Potential and kinetic energy cannot exist together. They are polar opposites.
What is a conductor?
Materials that allow heat to flow easily
What is velocity measured in?
m/s