A
pulley
is
a
wheel
with
a
____________________
that
turns
on
an
____________________
.
It
is
fixed
to
a
solid
____________________
.
There
is
a
____________________
or
a
____________________
inside
the
groove
that
allows
you
to
lift
objects
easily
by
____________________
a
force
(
F
)
against
a
resistance
(
R
)
.
It
allows
us
to
lift
and
lower
loads
easily
and
is
used
in
____________________
,
simple
____________________
and
gym
____________________
.
Movable
pulley
This
is
a
set
of
two
pulleys
,
one
fixed
and
another
with
linear
movement
.
Compound
pulley
This
is
a
special
combination
of
fixed
and
____________________
pulleys
.
The
more
pulleys
we
have
,
the
more
complex
the
____________________
,
but
the
easier
it
is
to
lift
the
load
.
Movable
and
____________________
pulleys
can
be
used
for
____________________
and
crane
s
