Abstract
An angular momentum spinner includes two or more rotating arms loaded with an adjustable sliding block
for each arm and laid symmetrically about a rotating center. Each sliding block is controlled to move
along the corresponding rotating arm. Such a spinner can display the conservation of angular momentum
vividly and intuitively, and can also serve as an amusing toy for children. The spinner can be used as a
teaching equipment to demonstrate the theorem of angular momentum conveniently, intuitively and
amusingly.
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