Curriculum
Course: Applied Mathematics — Second Secondary
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Curriculum

Applied Mathematics — Second Secondary

Unit 1: Statics

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Unit 2: Solid and Analytic Geometry

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Text lesson

Equilibrium of a Rigid Body under Coplanar Forces

Applied Mathematics — Second Secondary

Equilibrium of a Rigid Body under Coplanar Forces

Lesson summary

Lesson summary

  • A body is in equilibrium when it is at rest or moves with constant velocity, and the resultant of the forces on it is zero.
  • For coplanar concurrent forces, the conditions are ΣX = 0 and ΣY = 0.
  • Draw the force diagram, resolve the forces into components, write the two equations and solve them.
  • If three forces alone keep a body in equilibrium, they form a closed triangle when drawn head to tail.
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