P1 Motion Flashcards
(24 cards)
use of rulers and measuring cylinders
to find a length/volume
use of clocks and devices(analogue+digital)
for measuring an interval of time
use of micrometer screw gauge
to measure very small distances
define speed
total distance/total time
acceleration of free fall g for a body near to the earth is _____.
constant
define velocity
change of velocity/total time
acceleration formula
change of velocity/total time
define mass
the amount of matter in a material
define weight
the amount of gravity force acting upon the matter
earth is the source of a _____ field.
gravitational
what does ‘g’ represent?
the gravitational force on a unit mass measured in N/kg
weight formula
W=mg
density formula
p or d=m/v
define friction
the force between two surfaces which impedes motion and results in heating
define air resistance
a form of friction
Hooke’s law
F=kx, k is the spring constant
force formula
F=ma
what is the limit of proportionality?
the highest stress at which the stress-strain curve is a straight line.
what is the limit of proportionality?
the highest stress at which the stress-strain curve is a straight line.
Pressure formula
p=F/A
define the moment of a force
a measure of its turning effect
moment of a force everyday examples
a seesaw, the opening/closing of a door
moment formula
product force x perpendicular distance from the pivot
what is equilibrium?
when there is NO RESULTANT FORCE and NO RESULTANT TURNING EFFECT
