Torque is maximum when applied force is at an angle of _ to the lever arm.
Correct answer: A. 90°
- A. 90°
- B. 0°
- C. 45°
- D. 180°
Explanation
Torque is given by the formula Torque = rFsinθ, where r is the lever arm length, F is the magnitude of the applied force, and θ is the angle between the force vector and the lever arm. The function sinθ reaches its maximum value of 1 when θ is 90°, meaning that the force is perpendicular to the lever arm. Thus, the torque is maximized when the angle is 90°. Other angles, such as 0° or 180°, result in zero torque because the force is parallel to the lever arm, making sinθ equal to 0. At 45°, the torque is non-zero but not maximized because sin45° is less than 1.
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