Homework Help: Science

Posted by SUZY on Sunday, May 1, 2011 at 2:33pm.

You
are
riding
a
sled
across
frictionless
ice.
It
has
been
given
an
initial
push
and
is
now
traveling
at
a
constant
velocity,
in
a
straight
line.
Snow
is
falling
vertically
(as
seen
by
a
person
standing
still
on
the
ice),
and
the
snow
is
accumulating
on
the
sled.
You
have
three
strategies
for
trying
to
keep
the
sled
moving
as
fast
as
possible:
a)
Sweep
the
snow
off
the
sled
so
that
it
leaves
the
sled
in
the
direction
perpendicular
to
the
sled's
motion,
as
seen
by
you
in
the
reference
frame
of
the
sled.
b)
Sweep
the
snow
off
the
sled
so
that
it
leaves
the
sled
in
the
direction
perpendicular
to
the
sled's
motion,
as
seen
by
you
in
the
reference
frame
of
someone
standing
still
on
the
ice.
c)
Do
nothing.
Rank
the
strategies
in
effectiveness
and
explain
your
reasoning.

Science - Ms. Sue, Sunday, May 1, 2011 at 2:41pm
This is much too difficult to read.
Science - SUZY, Sunday, May 1, 2011 at 3:17pm
SRRY

You are riding a sled across frictionless ice. It has been given an initial push and is now traveling at a constant velocity, in a straight line.Snow is falling vertically (as seen by a person standing still on the ice), and the snow is accumulating on the sled. You have three strategies fortrying to keep the sled moving as fast as possible:
a)Sweep the snow off the sled so that it leaves the sled in the direction perpendicular to the sled's motion, as seen by you in the reference frame of the sled.
b) Sweep the snow off the sled so that it leaves the sled in the direction perpendicular to the sled's
motion,as seen by you in the reference frame of someone standing still on the ice.
c) Do nothing.
Rank the strategies in effectiveness and explain your reasoning.

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