2. The effective length of a compression member of length L held in position and restrained in direction at one end and effectively restrained in direction but not held in position at the other end, is
5. If the unsupported length of a stanchion is 4 metres and least radius of gyration of its cross-section is 5, the slenderness ratio of the stanchion, is
9. If C is basic capacity per lane, V is velocity in km/hour, S is stopping distance pluslength of the vehicles in metres, the formula is applicable to