Summary Chapter 7: Further mechanics

Further Mechanics




:
IRCULAR
CM OTION


:
describes around
an
object going acircle at a constant speed measured in radians




.
s ZI
force

resultant force a centriberal 3600




"
.
the of ~




angular speed
:
z anggle turned circular motion has frequency 4 period
V

w WW=
T
= 21
=Q
radises of circle Ims f
per W




=211
F
s




-revolutions
second I




objects travelling in circles are
accelerating because their
relocity is
changing ( in direction




.
change
)
a centriperal acceleration directed the circle
towards cemtre of the
=
,
nlimear
}
peed
2

A a
=zur
sradius Coms
=
r
s
angular speea crads
.



If there is an acceveration
-"}
there is a force F




=ma
,
towards the centre of the circle


F
MV MLoßr
=
=
?
iadinnemnt
simple

S : Harmomic




careinians
-
Mmotion


m




?
a type of oscillation to and from either side of midpoint
its




a
:
.
distance of the
object s
midpoint :
displacement

always a
restoring force pulling the
object towards the midpoint directed toward

size of force a displacement mid
-point
acceleration a displacement




İ
ñï
"
"
midpoint max amplitude
:
:
EP =
Eß
O
=max
Ek EK
=O
=max
s
Bis placement

lett side right side
-hand
-hand
. motion is Not damped EP energy sconstant
If
+EK=mechanical
,