Solution:
Considering the unit of length of link in centimetre.
The velocity of Point B
Vb=rb
=2*10-2*8
=0.16 m/s
By the rigid body consideration,
Vb=rcb cd
cd=
Vb / rcb
=0.16/4*10-2
= 4 rad/s
thus,
Vd= rcd*cd
=5.5*10-2*4
=0.22 m/s
Vc=rcc*cd
=0*4
=0 m/s
Answer: Vb=0.16 m/s , Vc= 0 m/s and Vd= 0.22 m/s
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