Number of Degrees of Freedom for Plane Mechanisms MCQ

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• The instantaneous center of a rigid thin disc rolling on a plane rigid surface is located at
  ক

  the centre of the disc

  খ

  the point of contact

  গ

  an infinite distance on the plane surface

  ঘ

  the point on the circumference situated vertically opposite to the contact point
• When a slider moves on a fixed link having curved surface, their instantaneous centre lies
  ক

  on their point of contact

  খ

  at the centre of curvature

  গ

  at the centre of circle

  ঘ

  at the pin joint
• The magnitude of velocities of the points on a rigid link is
  ক

  directly proportional to the distance from the points to the instantaneous centre and is parallel to the line joining the point to the instantaneous centre.

  খ

  directly proportional to the distance from the points to the instantaneous centre and is perpendicular to the line joining the point to the instantaneous centre.

  গ

  inversely proportional to the distance from the points to the instantaneous centre and is parallel to the line joining the point to the instantaneous centre.

  ঘ

  inversely proportional to the distance from the points to the instantaneous centre and is perpendicular to the line joining the point to the instantaneous centre.
• Which of the following property of the instantaneous center is correct?
  ক

  A rigid link rotates instantaneously relative to another link at the instantaneous centre for the configuration of the mechanism considered.

  খ

  The two rigid links have no linear velocity relative to each other at the instantaneous centre.

  গ

  The velocity of the instantaneous centre relative to any third link is same whether the instantaneous centre is regarded as a point on the first link or on the second rigid link.

  ঘ

  all of the mentioned