The distance between the forces acting in the couple is

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RRB JE ME CBT 2 Previous Paper 2: Held on 31 Aug 2019
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  1. A finite variable distance
  2. Infinity
  3. Always a fixed distance
  4. Zero

Answer (Detailed Solution Below)

Option 1 : A finite variable distance
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Explanation:

Couple

RRB JE ME D16

  • When you use two hands to turn the handlebars of your bicycle or the steering wheel of your car you are applying two parallel forces to the same object.
  • These two forces are not in equilibrium because they do not act in the same straight line.
  • They are called a couple and have a turning effect or moment.

Important Points

Moment – The moment of a couple is the product of the magnitude of one of the forces F and the perpendicular distance d between the two forces.

M = Force × perpendicular distance

A couple is a pair of force acting on an object on an object which

  • Are equal in magnitude and opposite direction
  • Do not act along the same straight line
  • Apply a moment to the object and so tend to turn it

Do not produce a single resultant force and so do not tend to move it from one position to another

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