question_answer

If a street light of mass Mis suspended from the end of a uniform rod of length L in different  possible patterns as shown in the figure, then

[A]                                  [B]

[C]

A) pattern A is more sturdy        

B) pattern B is more sturdy

C) pattern C is more sturdy

D) all will have the same sturdiness

Correct Answer: A

Solution :

For equilibrium of street light, \[\operatorname{mg}\,\,\times \,\,x=T\,\,\times \,\,y\] \[T=\frac{mg\cdot x}{y}\] For T to be minimum, y should be maximum. Hence, pattern A is more sturdy.