Which of the following reason(s) support(s) the usage of sleepers below the rails?
(A) To reduce the pressure
(B) To increase the normal reaction
(C) To increase the surface area
(D) To accommodate the thermal expansion/contraction of the rails Continue reading Sleepers Below the Rails
An L-shaped object, made of thin rod of uniform mass density, is suspended with a string as shown in figure. If AB = BC, and the angle made by AB with downward vertical is $\theta$, then:
(A) $tan\theta = \frac {1}{2}$
(B) $tan \theta = \frac {1}{3}$
(C) $tan \theta = \frac {2}{\sqrt 3}$
(D) $tan \theta = \frac {1}{2\sqrt 3}$
[Based on JEE Main 2019]
There are two columns. Match Column I with appropriate match(es) in Column II.
