3.4 Materials
, and Hooke 's Law
Springs
change the shape of an object you
To
,
need a
pair
of equal and opposite forces .
> > <
tensile forces compressive forces
Hooke's law : the extension of a
spring
is
directly
proportional to the force applied , up until
the elastic limit .
Force extension
graph
-
:
F
from the origin to A extension ,
A. is
directly proportional to
force applied and the
spring
only deforms elastically (will
return to
original shape /
Point A is the elastic limit From
.
here onwards,
deformation
is
plastic
.
0 x
;
f- Roc F, N
-
force ,
in newtons ,
per metre Nm
"
K, force constant ,
in newtons ,
X, extension ,
in metres , m .
The larger the
force constant ,
the stiffer the
spring .
x can also represent the compression of the spring .
, and Hooke 's Law
Springs
change the shape of an object you
To
,
need a
pair
of equal and opposite forces .
> > <
tensile forces compressive forces
Hooke's law : the extension of a
spring
is
directly
proportional to the force applied , up until
the elastic limit .
Force extension
graph
-
:
F
from the origin to A extension ,
A. is
directly proportional to
force applied and the
spring
only deforms elastically (will
return to
original shape /
Point A is the elastic limit From
.
here onwards,
deformation
is
plastic
.
0 x
;
f- Roc F, N
-
force ,
in newtons ,
per metre Nm
"
K, force constant ,
in newtons ,
X, extension ,
in metres , m .
The larger the
force constant ,
the stiffer the
spring .
x can also represent the compression of the spring .
