What is the angular speed about the rotational axis

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6.What is the angular speed about the rotational axis of the Earth for a person standing on the surface?a.7.3105rad/sb. 3.6105rad/sc.6.28105rad/sd. 3.14105rad/s
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7.The end of the cutting cord on a gas-powered weed cutter is 0.15 m in length. If the motor rotates at the rateof 20 rev/s, what is the tangential speed of the end of the cord?
____8.The acceleration due to gravity at the surface of Planet X is 10 m/s2. What is the acceleration due to gravity atan altitude of 3 000 km above the surface of this planet?22
____9.An object when orbiting the Earth at a height of three Earth radii from the center of the Earth has a weight of1.00 N. What is the object's mass? (gat the surface of the Earth is 9.8 m/s2)
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