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Could somebody give me some clues in order to solve this problem?

A particle moves in a circle that is centered at the origin. The particle has positionrand angular velocityw

a) Show that its velocity isv=wxr

b) Show that its centripetal acceleration isa=wxv=wx (wxr)

I knowr= xi+ yj+ zk, but from now I don't know how to finish solving the problem....

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# Homework Help: Velocity & Accelerationvectors Help Needed B4 Tomorrow Please!

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