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Several children are on the edge of a spinning merry-go-round. At the same time all the children crawl to the center of the merry-go-round. The merry-go-round will increase its angular velocity because: a) the moment of inertial is increased. b) the moment of inertia is decreased. c) angular momentum must be conserved. d) angular momentum is not conserved.
Sagot :
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