Question

Two identical pendulums are tied from the same rigid support. One is tied horizontally. The other is released when they are making the same angle θ with the vertical.

• A. tan²θ
• B. cot²θ
• C. 1
• D. sec²θ

Answer 1

Answer: (D)

sec²θ

Answer 2

T₁ cos θ = mg

T₁ = mg/cosθ

T₂= mg cos θ

∴ T₁/T₂ = 1/cos²θ

= sec²θ