[tex]T=60s\\r=7cm=0.07m\\v=\frac{2\pi r}{T} =\frac{2*3.14*0.07}{60} =7.3*10^{-3} m/s[/tex]
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[tex]T=60s\\r=7cm=0.07m\\v=\frac{2\pi r}{T} =\frac{2*3.14*0.07}{60} =7.3*10^{-3} m/s[/tex]