Um, err…The linear momentum of the water is transferred to angular momentum of the toy through forces. N2nd: Impact=change in momentum. Momentum transferred from water to shell of toy via N3rd. Centripetal friction forces in toy cause rotation and angular momentum. 🤷♂️
Video description: view of a colorful spinny toy in a sink. Starts at rest, and when the water stream moves over it, it starts to spin. There is a slo-mo part in the middle.
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