On loading it with goods weighing 520 kN on a truck, its spring gets compressed by 26 cm, The weight of an empty truck is 350 kN. (a) Calculate its natural period of vibrations when the truck is (1)...

Extracted text: On loading it with goods weighing 520 kN on a truck, its spring gets compressed by 26 cm, The weight of an empty truck is 350 kN. (a) Calculate its natural period of vibrations when the truck is (1) empty and (ii) loaded as above. (b) It is set into natural vibrations with an amplitude of 170 mm when loaded. Calculate the velocity and acceleration of the truck when its displacement is 80 mm from statically equilibrium position. Also calculate the maximum acceleration