Please enable JavaScript.
Coggle requires JavaScript to display documents.
Physical quantities and measurement techniques - Coggle Diagram
Physical quantities and measurement techniques
Measurements
Accuracy: Measure of how close the obtained result with the original value.
Reliability: The measure of how same/equal the results obtained are once the experiment is repeated.
Distance
Ruler
Accuracy: Taking AVG increases accuracy ( multiple readings and AVG them)
source of error: Parallax error and Systematic error(Rulers can only show up to nearest MM)
Time
Stop watch
Accuracy :multiple readings and AVG them
source of error: Random error and zero error
Volume
Measuring cylinder
Accuracy: Use a burette(smaller scale) and a reading card
Error: Systematic , random , parallax
Scalar
Magnitude
Examples
MASS
TIME
DISTANCE
ENERGY
temperature
Vector
magnitude
direction
Examples
VELOCITY
DISPLACEMENT
FORCE
MOMENTUM
FIELD STRENT
Acceleration
Resultant force of vector
Left and down is negative ( NOTE DONT INCLUDE FORCE AS NEGATIVE BUT WITH DEGREE FROM NORTH)
Q) If plane moves 4M/S south and Air is 1M/S east
resultant: root 4 square + 1square = 4.12M/S 76 degree due north