Question
A four bar mechanism is shown below. For the mechanism to be a crank-rocker mechanism, the length of the link PQ can be
Options :
80 mm
200 mm
300 mm
350 mm
Answer :
80 mm
Solution :
For Crank-Rocker mecchanism, shortest link must be crank and adjacent to fixed as well as Grashoff's law must be satisfied.
If I = 80 mm
then shortest will be = 80 mm
as well as (80 + 600) < (400 + 300) 680 < 700
Therefore law is satisfied.
⇒ I = 80 mm
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