Here are the two methods I have (hopefully easier to read this time)... Momentum doesn't seem to be conserved though, doesn't an external force stop the skater at the end, so net external force is nonzero? I can't see how the whole line can start rotating without an external force applied. The...
By conservation of momentum I meant...
L = L'
r x p = Iw ... then taking middle of the line as centre of mass
(12/2) (8*60) (4.6) sin 90 = 1/3 (8*60)(12)^2 w ... inertia approximated by a rod rotating about one end with rotational inertia I=1/3ML^2.
then solve for w...
However, is that...
Oops I forgot to tell you, the line of skaters were originally skating at 4.6m/s until the one guy at the end stopped.
the question has 3 parts.
a) what is the angular speed of outermost skater
b) what is the linear speed of outermost skater
c) what is the force exerted on the outermost...
if eight 60 kg skaters join hands and skate in a line that's 12m wide at 4.6m/s, and one skater at the end stops abruptly, and the whole line rotates about that skater rigidly, what is the angular speed of the outermost skater?
... would the momentum be conserved?