Question Detail
Question
A conical pendulum has a string of length L and makes an angle θ with the vertical. The radius r of the horizontal circle is given by:
Correct Answer
Option A is the correct answer.
Detailed Explanation
From the geometry of the conical pendulum diagram described, the string of length L is the hypotenuse, the vertical leg is L cos θ, and the horizontal radius r is the opposite side, so r = L sin θ.
Hint
Imagine the string as the hypotenuse of a right triangle. The radius of the circle is the side opposite to the angle θ.