Page 15 - SIMPLE MACHINES

Typ e s o f p ul l e y :
Types of pulley:

A pulley can be of two
A
p
an

be

t
l
l
wo
e
u
c
y

of

t y p e s -
types-
F
–

p
e
A. Fixed pulley –
x
d
i
A
u
.
l
e
y
l
y
e
t
l
s

a

l
ul

f
s

irs
s
t
c
s

a
c
a
a
ed
er.
l

A
ix
f
ev

p
• •A fixed pulley acts as a first class lever.
The fulcrum is the axle (the point at which
T h e f ul c rum is t h e a x l e ( t h e p o in t a t w h ic h

p
rt
is
t
p
o
h
the pulley is supported).
ul
d)
e
s

e
e
up
y
.
l
ied

rt
a

p
• •In a pulley, an effort is applied in one
is
In
p
l

o
,
o
y
n

l

a
n
ul
p
in
f
e
e
a

e
f
direction and a load moves in another
direc t io n a n d a l o a d m o v es in a n o t h e r
.

io
n
direc
direction.
t
o

ix
t
f

ed
a
is
d
e
ix
l
ul
p

In
• •In a fixed pulley, the pulley is fixed to a
f

a
ul
p
e

ey
l
,
y
e
h
t

support, such as wall. One end of the rope
s up p o rt , s uc h a s w a l l . O n e en d o f t h e ro p e
is attached to the load.
is a t t a c h ed t o t h e l o a d.