로그인

Understanding the scalar formulation of the moment of a force and applying it correctly through problem-solving is crucial in designing and analyzing mechanical systems. Here are the steps for problem-solving with the moment of a force:

  1. Draw a free-body diagram (FBD) of the system. The FBD is a basic problem-solving step. It is a diagrammatic representation of all the forces acting on the system. Every force acting on the system must be identified and included in the FBD.
  2. Identify the axis or point about which the moment is calculated. In some cases, the axis or point about which the net moment needs to be calculated is provided. However, in other cases, the problem requires selecting an appropriate axis or point.
  3. Calculate the perpendicular distance between the force and the axis or point. The perpendicular distance is the shortest distance between the force and the chosen axis or point.
  4. Calculate the moment of each force. In this step, the magnitudes of the individual forces and their distances to the chosen axis or point are multiplied to calculate their respective moments. Here, the moment of a force is a vector quantity, and its direction is perpendicular to the plane of the force and the chosen axis or point.
  5. Sum the moments. Once the moments of all the forces have been calculated, they must be algebraically summed to obtain the net moment acting on the system.
  6. Determine the effect of the net moment. If the net moment is zero, there is no rotational motion. If the net moment is negative, the object will rotate clockwise, and if the net moment is positive, the object will rotate counterclockwise.
  7. Solve the problem. The final step of problem-solving is to use the calculated net moment to solve the given problem. For instance, if the angular acceleration of an object needs to be calculated, the net moment acting on the object is divided by the moment of inertia of the object.
Tags
Moment Of A ForceProblem solvingFree body DiagramFBDMechanical SystemsAxis Of RotationPerpendicular DistanceNet MomentRotational MotionAngular AccelerationMoment Of InertiaVector QuantityClockwise RotationCounterclockwise Rotation

장에서 4:

article

Now Playing

4.2 : Moment of a Force: Problem Solving

Force System Resultants

506 Views

article

4.1 : 힘의 순간: 스칼라 공식화

Force System Resultants

621 Views

article

4.3 : 결과 모멘트: 스칼라 공식화

Force System Resultants

1.3K Views

article

4.4 : 힘의 모멘트: 벡터 공식화

Force System Resultants

2.0K Views

article

4.5 : 벡터 공식화를 위한 데카르트 형태

Force System Resultants

532 Views

article

4.6 : 결과 모멘트: 벡터 공식화

Force System Resultants

2.9K Views

article

4.7 : 모멘트의 원리

Force System Resultants

1.5K Views

article

4.8 : 순간의 원리: 문제 해결

Force System Resultants

740 Views

article

4.9 : 축을 기준으로 한 힘의 모멘트: 스칼라

Force System Resultants

278 Views

article

4.10 : 축을 기준으로 한 힘의 모멘트: Vector

Force System Resultants

283 Views

article

4.11 : 부부

Force System Resultants

360 Views

article

4.12 : 커플: 스칼라 및 벡터 공식화

Force System Resultants

205 Views

article

4.13 : 동등한 커플

Force System Resultants

242 Views

article

4.14 : 커플의 순간: 문제 해결

Force System Resultants

789 Views

article

4.15 : 힘과 커플의 체계

Force System Resultants

379 Views

See More

JoVE Logo

개인 정보 보호

이용 약관

정책

연구

교육

JoVE 소개

Copyright © 2025 MyJoVE Corporation. 판권 소유