11.A car goes round a curve of radius 100 m at 25 m/sec. The angle to the horizontal at which the road must be banked to prevent sideways friction on the car wheels is tan"1 x, where x is (Assume g = 10 m/sec2)

12.The shape of a suspended cable for a uniformly distributed load over it is

13.A shell travelling with a horizontal velocity of 100 m/sec explodes and splits into two parts, one of mass 10 kg and the other of 15 kg. The 15 kg mass drops vertically downward with initial velocity of 100 m/sec and the 10 kg mass begins to travel at an angle to the horizontal of tan"1 x, where x is

14.The maximum pull in a cable, carrying a uniformly distributed load and supported at two ends which are at the same level, is at

15.Minimum pull in a suspended cable with supports at two ends is equal to