Question Detail
Question
Calculate the period of a conical pendulum of length 4 m given that the string turns at a constant angle of 60° to the vertical?
Correct Answer
Option D is the correct answer.
Detailed Explanation
For conical pendulum, T = 2π√(L cos θ / g) = 2π√(4 × cos 60° / 9.8) = 2π√(4 × 0.5 / 9.8) = 2π√(2/9.8) = 2π√0.2041 = 2π × 0.4518 = 2.84 s ≈ 2.81 s.
Hint
T = 2π√(L cos θ / g).