Force Systems

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Government College of Engineering,
Aurangabad. Maharashtra State,India. (An
Autonomous Institute of Government of Maharashtra)
Department of Applied Mechanics
Presentation on Force System By SALUNKHE UMESH
S.
DATE 26/06/2015
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• A force is an external agency (push or pull)
  which changes the state of rest or of uniform
  motion of a body.
• (i) Produces motion in a body at rest, (ii) Stops
  or tries to stop a moving body, or (iii) changes
  or tries to change the direction of motion of the
  body.
• Newton's first law states that every object will
  remain at rest or in uniform motion in a straight
  line unless compelled to change its state by the
  action of an external force.
• Newton's second law of motion states that the
  rate of change of momentum is equal to the force
  acting on the particle.
• Force ? rate of change of momentum
• ? rate of change of (mass velocity)
• Force ? mass rate of change of velocity
• ? mass acceleration
• F ? ma

U.S.Salunkhe Force System DATE 26/06/2015
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• A force system is a collection of forces acting
  at specified locations in one or more planes.
• When two or more forces act on a body, they are
  called for a system of force.
• Concurrent / Non-concurrent Point
• Coplanar / Non-coplanar Plane
• Collinear/ Non-collinear Linear
• Parallel/ Non-Parallel llel or Not

Concurrent forces The forces, which meet at one
point.
U.S.Salunkhe Force System DATE 26/06/2015
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• Non-concurrent Forces The forces, which act at
  different points.
• Coplanar forces The forces, whose lines of
  action lie on the same plane.
• Non-coplanar Forces The forces, whose lines of
  action lie on the different plane.

U.S.Salunkhe Force System DATE 26/06/2015
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Collinear forces The forces acting along the
same line of action. Non-collinear
forces The forces acting along the different
lines of action.
U.S.Salunkhe Force System DATE 26/06/2015
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Parallel Forces The forces line of action are
parallel to each other is called parallel forces.
(b) Unlike parallel forces
Collinear
U.S.Salunkhe Force System DATE 26/06/2015
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Coplanar Collinear force system The forces
acting along the same line in the same
plane. Coplanar Non-collinear force
system Coplanar concurrent forces system
U.S.Salunkhe Force System DATE 26/06/2015
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Coplanar Non-concurrent forces system Coplana
r Parallel force system (a) Like Parallel (b)
Unlike Parallel Coplanar Non-parallel force
system (a) Like Parallel (b) Unlike
Parallel Coplanar Non-concurrent non-parallel
forces system
U.S.Salunkhe Force System DATE 26/06/2015
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Non-coplanar Concurrent force system Non-copla
nar Non-concurrent force system Non-coplanar
Parallel force system Non-coplanar
Non-parallel force system Non-coplanar
Non-concurrent Non-parallel force system
U.S.Salunkhe Force System DATE 26/06/2015
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Thank You !!!!