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A grinding wheel 0.35 m in diameter rotates at 2500rmp. What is the linear acceleration of a point on the edge of the grinding wheel?

For the linear acceleration, should it be atotal=atan+aR? Should we find both tangential acceleration and centripetal acceleration? But on the answer key, it's only centripetal acceleration. i dont' know why? But also I can not find tangential acceleration since I dont know the time. Hope you can help. thanks.

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# Homework Help: Linear acceleration and a grinding wheel

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