Temperature and Thermal Energy
The temperature of a gas is proportional to the average kinetic energy of its particles
Thermal energy is a measure of the internal motion of an objects particles
A thermometer reaches thermal equilibrium with the object
Energy and Work
Work is the transfer of energy by mechanical means
W = Fd
A moving object has kinetic energy
KE = x m x v2
The work done on a system is equal to the change in energy of the system
W = deltaKE
Work is the product of the force exerted
Temperature and Thermal Energy
The temperature of a gas is proportional to the average kinetic energy of its particles
Thermal energy is a measure of the internal motion of an objects particles
A thermometer reaches thermal equilibrium with the object
Vectors
When two vectors are at right angles, you can use the Pythagorean theorem to
determine the magnitude of the resultant vector
R2 = A2 + B2
The law of cosines and law of sines can be used to find the magnitude of the resultant of
any two vectors
Force and Motion
An object that experiences a push or a pull has a force exerted on it
Forced have both direction and magnitude
Forces may be divided into contact and field forces
In a free-body diagram, always draw the force vectors leading away from