Created by StemPy LabA thin uniform spherical shell has mass , radius and centre O. A small hole is cut in it at a point H, as shown in the figure. Which of the following statements are correct?
One or more options are correct. Tick all the correct ones: a wrong option costs marks, and a part-right answer earns part of the marks.
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← A satellite of mass 1000 kg moves in a circular orbit of radius 2R round the Earth, where R = 6400 km is the Earth's radius. How much energy must be supplied to move it into a circular orbit of radius 4R? Take g = 10 m/s² at the Earth's surface.Three stars, each of mass 2.0 × 10³⁰ kg, sit at the corners of an equilateral triangle of side 1.0 × 10¹¹ m. They move together in one circle round the centre of the triangle, under their own gravity alone, so that the triangle keeps its shape, as shown in the figure. Take G = 6.67 × 10⁻¹¹ N m²/kg². What is the period of their motion? →
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