A
box
of
mass
56g
is
attached
to
a
horizontal
spring
with
spring
constant
111N/m.
The
spring
is
then
extended
by
15
cm,
and
the
box
is
subsequently
released.
Calculate
the
speed
of
the
box,
assuming
the
entire
elastic
potential
energy
is
converted
to
the
box's
kinetic
energy.
Give
your
answer
to
2
decimal
places
if
needed.