## College Physics (4th Edition)

To simulate the Earth's gravitational field, the angular speed should be $7.0~rad/s$
To simulate the Earth's gravitational field, the radial acceleration should be equal to $g$. We can find the required angular speed: $\omega^2~r = g$ $\omega = \sqrt{\frac{g}{r}}$ $\omega = \sqrt{\frac{9.80~m/s^2}{0.20~m}}$ $\omega = 7.0~rad/s$ To simulate the Earth's gravitational field, the angular speed should be $7.0~rad/s$.