They will each alternately lose and gain motion, but will never come to
rest, and will continue to swing in opposite directions--that is, while A
swings north or east B will be swinging south or west, and vice versa.
3. Start them both in the same direction, but one from a higher point than
the other. There will be the same transference of energy as in (2), but
neither will come to rest between alternations, and they will always swing
in the same direction.
Unequal Lengths.--If for one of the original pendulums we substitute one
a couple of inches longer than the other, but of the same weight, the same
set of three experiments will provide six variations among them, as in each
case either the longer or the shorter may be started first or given the
longer initial swing, as the case may be. The results are interesting
throughout, and should be noted.
Three or more Pendulums.--If the number of pendulums be increased to
three or more, the length of all being the same, a fresh field for
observation is opened. With an increase of number a decrease in the
individual weighting is advisable, to prevent an undue sagging of the
string.
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