question_answer

If a street light of mass M is suspended from the end of a uniform rod of length L in different possible patterns as shown in 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 same sturdiness

Correct Answer: A

Solution :

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