题目

When Dean Arnold got his first job, he was miserable (痛苦的), Each time he went to work, he coughed and he couldn’t breathe. Working in a bakery(面包房) when you are allergic to (对…过敏) flour can be painful. But Arnold stayed with the National Biscuit Company for ten years. He was a businessman and he helped them improve production. At last his health problems became too serious. He left and formed his own company. With his wife and mother, he founded Arnold Bakery. They tried new recipes (配方). changing the kind and amount of flour used. This enabled Arnold to work 15．地球赤道半径为R，已知正常情况下，地球表面的重力加速度是g，地面附近的物体所受的万有引力可以认为近似与物体的重力相等．设想地球的自转速度越来越快，当角速度ω＞$\sqrt{\frac{g}{R}}$时，赤道上的物体将“飘”起来．