Three spheres are place on a plane such that they touch each other, they are tightly tied by a string so that they don't lose contact. A fourth sphere is placed on top of them such that the centers of the spheres form a trigonal pyramid (as shown in figure). Find the tension in the string.
Consider all spheres to be of same weight(W) and radius(R).
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The flat surface of hemisphere will have section of circle with radius equal to radius of sphere. Here the hemisphere is placed on H.P on its flat surface so it gives semi circle from front view. Explanation: Hemisphere is solid formed by cutting the sphere at its middle.
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