Question

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. pattern A is more sturdy
• B. pattern B is more sturdy
• C. pattern C is more sturdy
• D. all will have same sturdiness

Answer 1

Answer: (A)

pattern A is more sturdy

Answer 2

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