Chapter 02 Fundamentals Of Radiologic Science Flashcards
The study of interactions of matter & energy
Physics
Three Base Quantities
Mass, Length, Time
The combination of one or more base
quantities
Secondary/Derived Quantities
Exposure, Dose, Equivalent Dose &
Radioactivity
Special Quantities
IBWM
International Bureau of Weights &
Measures
What is SI unit of Mass
Kilogram (kg)
What is SI unit of Length
Meter (m)
What is IS unit of Time
(s)
It has a magnitude & a unit
Measurement
Four Systems of Units
MKS
CGS
British
SI
The segment of physics that deals with
motion at rest (statics) & objects in motion
(dynamics)
Mechanics
It is sometimes called speed
Velocity
He presented the fundamental laws of
motion
Isaac Newton (1686)
A body will remain at rest or will continue
to move with constant velocity in a straight
line unless acted on by an external force
Newton’s First Law: Inertia
The property of matter that acts to resist a
change in its state of motion
Inertia
The force (F) that acts on an object is equal
to the mass (m) of the object multiplied by
the acceleration (a) produced
Newton’s Second Law: Force
A push or pull on an object
Force
For every action, there’s an equal &
opposite reaction
Newton’s Third Law: Action/Reaction
A force on a body caused by the pull of
gravity on it
Weight
The product of mass of an object & its
velocity
Momentum
The force applied times the distance
Work
The rate of doing work
Power
The ability to do work
Energy
States that energy may be transformed from
one form to another but it cannot be created
or destroyed
Law of Conservation of Energy
