## Essential University Physics: Volume 1 (3rd Edition)

We know that $\omega=\sqrt{\frac{g}{r}}$..........eq(1) Let x be the revolutions per minute required to simulate earth's gravity. Then radians per second conversion gives us $\omega=\frac{x\times 2\pi}{60}$...........eq(2) comparing eq(1) and eq(2), we obtain: $\frac{x\times 2\pi}{60}=\sqrt{\frac{g}{r}}$ This can be rearranged as: $x=\frac{60}{2\pi}\times \sqrt{\frac{g}{r}}$ We plug in the known values to obtain: $x=\frac{60}{2\times 3.1416}\sqrt{\frac{9.8}{\frac{450}{2}}}$ $x=1.99\space revolutions \space \space per\space minute$