Question Detail
Question
If a force F acts at the edge of a pulley of radius r, causing it to rotate through an angle θ, and the point of application moves a distance s along an arc, what is the relationship between s, r, and θ?
Correct Answer
Option B is the correct answer.
Detailed Explanation
The arc length s along a circle is related to the radius r and the angle θ (in radians) subtended at the centre by the equation s = rθ. This is a fundamental geometric relationship for rotational motion.
Hint
Recall the definition of an angle in radians: angle = arc length / radius.