T&T: Anchor,chain,rope specs and use

[Robin]

CORRECTION!
Yesterday I posted:
"...If a 40,000 lb boat gets moving/swinging at 1 knot and is brought to a
stop over three seconds, the force is F = MA = M (V/T) =40,000 (1/3) or
13,334
lbs!!!

 WRONG ANSWER!!!!! The  units I used are wrong.

The correct answer is about 703 lbs.  (What a relief! I expected to break
loose at the next swing at anchor!!!)

The correct calculation needs to change weight in pounds to mass via  m = W/g,
and since g is in ft/sec/sec units,  the one knot  figure must be converted to
feet  per second from nautical miles per hour, using 6076 ft/NM and 3600
seconds per hour) )...so here is what the calculation  really looks like:

F = MA = (W/g) (V/T)
F + (40K/32) (1 x 6076 x 1/3600/3) = 703 lbs

I have a bevy of great excuses liked up : (a) senility, (b) daughter was
headed out to a Dave Matthews Benefit Concert in NYC and was crying
hysterically, (c) Yorkie was bugging me for a walk, (This is a variation of
the old favorite "my dog ate my homework) (d) wife was trying to get me to
uncover the pool!!!

Rob Brueckner
Hatteras YF