A wagon weighing 50 kN moving at a speed of 8 kmph has to be brought to rest. Springs made of 25 mm Q rods with a mean diameter of 250 mm and with 24 turns are available. Find the number of springs...

A wagon weighing 50 kN moving at a speed of 8 kmph has to be brought to rest. Springs made of 25 mm Q rods with a mean diameter of 250 mm and with 24 turns are available. Find the number of springs required in the buffer to stop the wagon at a compression of 180 mm. G = 84 GN/m2.