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Moment of Force on a Rigid Body Video Lecture | Engineering Mechanics - Civil Engineering (CE)
FAQs on Moment of Force on a Rigid Body Video Lecture - Engineering Mechanics - Civil Engineering (CE)
| 1. What is the moment of force on a rigid body? |  |
Ans. The moment of force, also known as torque, is a measure of the rotational effect of a force on a rigid body. It can be defined as the product of the force applied to an object and the perpendicular distance from the point of application to the axis of rotation.
| 2. How is the moment of force calculated? | |
Ans. The moment of force can be calculated using the formula: moment of force = force × perpendicular distance. The force should be applied perpendicular to the axis of rotation, and the distance should be measured from the point of application to the axis of rotation.
| 3. What is the unit of moment of force? | |
Ans. The unit of moment of force is the newton-meter (Nm) in the International System of Units (SI). In some contexts, the unit may also be expressed as joule (J) or pound-foot (lb-ft).
| 4. How does the moment of force affect rotational motion? | |
Ans. The moment of force determines the rate of change of angular momentum of a rigid body. If the moment of force is greater, the rotational acceleration will be higher, resulting in faster rotational motion. Conversely, if the moment of force is smaller, the rotational acceleration and motion will be slower.
| 5. Can the moment of force be negative? | |
Ans. Yes, the moment of force can be negative. When a force is applied in the opposite direction to the desired rotation, it produces a negative moment of force. This means that the force tends to rotate the body in the opposite direction. The sign of the moment of force indicates the direction of the resulting rotation.
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