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Q:

The number of degree of freedom of a planer linkage with 8 links and 9 simple revolute joints is

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: C) 3

Explanation: L = 8 = number of links
P = 9 = number of simple revolute joints
F = 3(L – 1) – 2P
= 3(8 – 1) – 2 x 9
= 21 – 18
= 3.

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