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A uniform bar is pivoted about one end. Initially it is held vertical and allowed to fall. When its angular displacement is 180°, its acceleration is a) g b) 2g c) 3g d) 4g sry i can't confirm the answer ...
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Closed forms of the sum of powers for fixed values of m S_m(n) = \sum_{k=1}^n k^m = 1^m + 2^m + \cdots + n^m \, are always polynomials in n of degree m + 1. Note that Sm(0) = 0 for all m ≥ 0 because in this case the sum is ...
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is there a formula for finding out the no. of squares in a square??????? for example a chessboard.................... ...
