Module 2- Foundations of physics Flashcards
Quantity
Property of an object or of a phenomenon that can be measured
Base units
One of seven units that form the building blocks of the SI measurement system
Prefix
A word of letter placed before another one e.g. 5 km = 5 x 10^3 m
Derived quantities
A quantity that comes from a combination of base units
Derived units
A unit used to represent a derived unit such as N for force
Scalar quantity
A quantity that has magnitude or size without direction
Vector quantity
A quantity that has magnitude or size with direction
Parallel
Vectors in the same line and direction
Resultant vector
A single vector that has the same effect as two or more vectors added together
antiparallel
Vectors in the same line but in opposite direction
Vector triangle
A triangle constructed to scale to determine the resultant of two vectors.
Pythagoras theorem
The square of the length of the hypotenuse of a right angled triangle equals the sum of the squares of the other two sides
Component
One of the two perpendicular vectors obtained by resolving a vector
Mass
The matter content of a body
Density
Mass per unit volume
