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4. Prove the fractional change in the acceleration due to gravity at a distance 6r above the earths surface is given by-2dr/r, where r is the mean radius of the earth b) At what is distance above the earths surface has the acceleration due to gravity decreased by 2% compared to the mean value of 9.81 m/s2 observed at the earths surface? 5. In the dimensionally homogeneous equation a 3P/A-Tr/Ta,find the dimensions of Pand aif o is a stress, A is an area, T is a torque and r is a length

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a) since sin ce 64.00/100 64 64 Cm ウ LPiC MLT-2 FoR CE x Lengtt FORLE/AREA

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