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for a stone thrown from a tower of unknown height the maximum range for a projection speed of 10 m/s is obtained for a projection angle of 30 degree. the corresponding distance between the foot of the tower and the point of landing of stone is
let height be h, in x directn.x = 10cos30*t ….............(1) in y direcn.h = 10sin30*t – 0.5gt^2............(2)put eqn.(!) in (2) .i.e subsitiute value of tand then differnetiate x keeping h constant and equate it to zero and solve for x.
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