Which of the following is correct in the determination of the moment d...
The curled hand represents various thing. The direction of the moment axis is given by the thumb. The direction of the force is given by the fingers. As we place the fingers on the force and curl towards the rotational direction of the body about the axis.
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Which of the following is correct in the determination of the moment d...
The correct answer is option 'B': The thumb represents the direction of the moment.
The determination of the moment direction by curling of the wrist can be done using the right-hand rule. This rule is commonly used in physics and engineering to determine the direction of vectors in a three-dimensional space.
The right-hand rule states that if the fingers of your right hand are curled in the direction of rotation or movement, then your thumb will point in the direction of the resulting moment or vector.
Explanation:
To determine the direction of the moment using the right-hand rule, follow these steps:
1. Identify the axis of rotation: Determine the axis about which the object is rotating. This axis is usually perpendicular to the plane of rotation.
2. Position your hand: Place your hand in a way that your fingers can curl in the direction of rotation or movement. For example, if the rotation is clockwise, curl your fingers in that direction.
3. Orientation of your hand: Orient your hand such that your thumb is perpendicular to your curled fingers. The thumb should be pointing in the same direction as the axis of rotation.
4. Observe the thumb: The direction in which your thumb is pointing represents the direction of the moment.
So, in the context of the question, option 'B' is correct. The thumb represents the direction of the moment. This means that when you curl your wrist in a certain direction, your thumb will point in the same direction as the moment.
It is important to note that the direction of the force is not determined by the curling of the wrist. The direction of the force can be determined using other methods, such as the use of force diagrams or vector analysis.
In conclusion, the right-hand rule is a useful tool to determine the direction of the moment by curling of the wrist. The thumb represents the direction of the moment, while the fingers represent the direction of rotation or movement.
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