A simple truss is shown in figure below; force of 240 kN, 270 kN and 285 kN has been applied at point C, E and G respectively. (a) Determine the reaction forces at A and H . (b) Determine the forces carried by members AB, AC, BC and CE and state if the members are in tension or in compression.

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed