A railway truck has its centre of gravity at a height of 1.2 m above the ground and the rails are 1.5 m apart. Calculate the maximum safe speed with which it could travels round an unbanked curve of radius 32 m.

A railway truck has its centre of gravity at a height of 1.2 m above t

1.	A railway truck has its centre of gravity at a height of 1.2 m above the ground and the rails are 1.5 m apart. Calculate the maximum safe speed with which it could travels round an unbanked curve of radius 32 m.
Answer» SOLUTION :mg - weight of train, F-fnction, TV-normal REACTION of ground at A, when just at the point of turning, the reaction at B is zero. When truck is just in EQUILIBRIUM, `mg//CD = mv^(2)//rAD` `v = sqrt(gr xx AD//CD) = sqrt(9.8 xx 32 xx 0.75//1.2) = 14 m//s`