The science of physics Flashcards
the common method of testing a device accuracy
Two Reading/point Calibration
What’s the symbol for the international system of units
SI
What’s precision and what does it depend on
the exacatness of a measurement
it depends on:
1.instruments used
2.technique used
What’s accuracy
How well the results of the measurements agree or compare with the “real” value
conversion to meter centi
x10-2
conversion to meterdeci
x10-1
conversion to meterkilo
x103
conversion to metermega
x106
conversion to metergiga
x109
conversion to metertetra
x1
x1012
conversion to metermili
x10-3
conversion to metermicro
x10-6
conversion to meternano
x10-9
conversion to meterpico
x10-12
formulas for average velocity
=displacement/time
formulas for average speed
=distance/time
formula ofaverage acceleration
=change in velocity/change in time
what does the slope of a position-timegraph tells us?
And what does its absolute value tell us?
slope = average velocity
abs = average speed
what does the slope of velocity-timegraph tell us
acceleration
What soes a **negative acceleration ** tells us about an object
velocty=decreases
object=thrown up
speed=decreases
What soes a **positive acceleration ** tells us about an object
velocity=increases
object=falls down
speed=increases
what are the three acceleration formulas?
- Vf=Vi+axTf
- Df=Di+VixTf+1/2axTf^2
- V^2f=V^2i+2ax(Df-Di)
Examples of contact forces and field forces
contact:
friction
air resistance
tension
field:
gravity
magnetic
electric
whats the formula for **displacement **
velocity x time
