ABCD is a four bar mechanism, in which AD is the fixed link, and link BC is in the form of a circular disc with centre P. In which one of the following cases P will be the instantaneous centre of the disc?

If it lies on the perpendicular bisector of line BC.

If it lies on the intersection of the perpendicular bisectors of BC and AD.

If it lies on the intersection of the perpendicular bisectors of AB and CD.

If it lies on the intersection of the extensions of AB and CD.

ABCD is a four bar mechanism, in which AD is the fixed link, and link

1.	ABCD is a four bar mechanism, in which AD is the fixed link, and link BC is in the form of a circular disc with centre P. In which one of the following cases P will be the instantaneous centre of the disc?
A.	If it lies on the perpendicular bisector of line BC.
B.	If it lies on the intersection of the perpendicular bisectors of BC and AD.
C.	If it lies on the intersection of the perpendicular bisectors of AB and CD.
D.	If it lies on the intersection of the extensions of AB and CD.
Answer» E.

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ABCD is a four bar mechanism, in which AD is the fixed link, and link BC is in the form of a circular disc with centre P. In which one of the following cases P will be the instantaneous centre of the disc?

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