Created by StemPy LabA satellite of mass is to be launched from the surface of the Earth (radius ) into a circular orbit at a height above the surface. Ignore the Earth's spin and air resistance, and let be the acceleration due to gravity at the surface. The least energy that must be given to the satellite is
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← A uniform disc of mass 4 kg and radius 0.5 m can turn freely about a fixed horizontal axle through its centre. A light string wound round it is pulled with a steady force of 10 N, starting from rest. After 2 s, the angular velocity of the disc and the length of string pulled off areIn a long glass capillary tube dipped in water, the water rises 8 cm. Now the same tube is pushed down so that only 5 cm of it sticks out above the water surface. What happens? →
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