Unit 1 - Physics Notes
, Free Body Diagrams -
°
A force ,
E ,
is a push or a pull
The force of Fg force of attraction between all objects
gravity
•
, , is a
"
Normal force ,
En , is the force perpendicular to the surfaces of objects in contact
•
Tension force Ft exerted by materials such as ad cables that be stretched
, , , ropes ,
springs , ,
can
•
Friction force ,
Ff ,
resists the motion or attempted motion between
objects in contact ; acts in the direction
opposite to motion or attempted motion
Static friction force Is tends to stationary object from
prevent starting to
•
, , a move
°
kinetic friction force ,
Fie ,
acts
against a object 's motion
frictional
°
Air resistance force that opposes 2h
object 's motion
through air
°
Applied force F app contact force that does not fit of the above
, , My in any
categories
°
Net force E F the vector of all forces body
, ,
is sum
acting on a
Free body FB D ) body with dot ad all the forces ( )
diagrams represents showing
°
C a a ,
arrows
acting on that object
Rulesforfree.BE/4Di2gr2MS-
I .
Represent the mass in question with a pointldot
2 The point represents ALL THE MASS concentrated the centre of
. at
gravity
A force be 2 visible
ectcontact OR invisiblelremoteinteractionbetween2mas#
°
can
°
Newton 's 3rd law identifies the 2 CAction-Rea.ci#
masses
interacting
.
When
labelling forces :
2) all forces must be shown on a FBD
b) each force will be numbered I this makes it easy to coordinate between multiple diagrams , and
indicate the relationship between force sizes )
subscripts indicates
Using
•
:
c) Which 2 masses are involved
d) I
how they are
interacting
ie .
remote attraction C
gravity ) ,
2 surfaces slipping C friction ) , perpendicular
Support I from below C normal ) ,
other types of direct pushes or pulls (applied )
Ex A
•
the to
.
puck slides across ice a
stop
What the forces the ?
I .
are on
puck
planet Earth
pulling the mass ( if it wasn't the
ground that why it would drop )
-
is on even on , is
2 How the the ?
.
is ice
touching puck
It not towards
-
is
pushing
The 2 surfaces retards
are
rubbing each other
wearing away causing the puck to slow down This
-
, .
, Free Body Diagrams -
°
A force ,
E ,
is a push or a pull
The force of Fg force of attraction between all objects
gravity
•
, , is a
"
Normal force ,
En , is the force perpendicular to the surfaces of objects in contact
•
Tension force Ft exerted by materials such as ad cables that be stretched
, , , ropes ,
springs , ,
can
•
Friction force ,
Ff ,
resists the motion or attempted motion between
objects in contact ; acts in the direction
opposite to motion or attempted motion
Static friction force Is tends to stationary object from
prevent starting to
•
, , a move
°
kinetic friction force ,
Fie ,
acts
against a object 's motion
frictional
°
Air resistance force that opposes 2h
object 's motion
through air
°
Applied force F app contact force that does not fit of the above
, , My in any
categories
°
Net force E F the vector of all forces body
, ,
is sum
acting on a
Free body FB D ) body with dot ad all the forces ( )
diagrams represents showing
°
C a a ,
arrows
acting on that object
Rulesforfree.BE/4Di2gr2MS-
I .
Represent the mass in question with a pointldot
2 The point represents ALL THE MASS concentrated the centre of
. at
gravity
A force be 2 visible
ectcontact OR invisiblelremoteinteractionbetween2mas#
°
can
°
Newton 's 3rd law identifies the 2 CAction-Rea.ci#
masses
interacting
.
When
labelling forces :
2) all forces must be shown on a FBD
b) each force will be numbered I this makes it easy to coordinate between multiple diagrams , and
indicate the relationship between force sizes )
subscripts indicates
Using
•
:
c) Which 2 masses are involved
d) I
how they are
interacting
ie .
remote attraction C
gravity ) ,
2 surfaces slipping C friction ) , perpendicular
Support I from below C normal ) ,
other types of direct pushes or pulls (applied )
Ex A
•
the to
.
puck slides across ice a
stop
What the forces the ?
I .
are on
puck
planet Earth
pulling the mass ( if it wasn't the
ground that why it would drop )
-
is on even on , is
2 How the the ?
.
is ice
touching puck
It not towards
-
is
pushing
The 2 surfaces retards
are
rubbing each other
wearing away causing the puck to slow down This
-
, .
