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Amrita School of Engineering

Department of Mechanical Engineering

MEC 206 Kinematic of Machinery- MECH-‘A’

TUTORIAL – 1

PART-A

1. How many iner!ion! are po!!i"le from a fo#r-"ar $inematic chain% &ame them "a!e' on

their inp#t-o#tp#t motion!(

2. )hat are the three con'ition! to o"tain a fo#r-"ar cran$ * roc$er mechani!m%

3. State at lea!t one !imilarity an' on e 'ifference "etween a Helical pair an' cylin'rical pair(

4. Define a $inematic chain an' write the relation "etween the n#m"er of pair! an' lin$!(

5. Differentiate "etween clo!e' pair an' #nclo!e' pair in $inematic mechani!m(

6. State any fo#r type! of $inematic pair! accor'ing to the type! of relatie motion "etween

them(

7. )hat i! a machine% +ie two e,ample! 'ifferentiate "etween a machine an' a !tr#ct#re(

8. )hat i! the 'ifference "etween $inematic chain an' mechani!m

.( E,plain +r#"ler’! criterion for 'etermining 'egree of free'om for mechani!m/0( Define $inematic pair an' ill#!trate any two type! of con!traine' pair(

//( En#merate the 'ifference "etween a machine an' a !tr#ct#re

/2( i!t o#t the iner!ion! of a 'o#"le !li'er cran$ chain

/1( State the K#t"ach criterion(/3( )hat i! an iner!ion%

/4( Define Kinematic pair(

/6( )hat 'o yo# mean "y iner!ion of a mechani!m%/5( )hat i! +ra!hoff’! law for a fo#r "ar lin$age%

/( Define $inematic! chain(

/.( Define D78 of a mechani!m

20( 9ll#!trate completely con!traine' motion an' incompletely con!traine' motion2/( Di!ting#i!h "etween $inematic! pair an' $inematic! chain(

22( Di!ting#i!h normal compon" hy6hhent of acceleration an' tangential component of 

acceleration(21( )hat type of lin$ will hae only centripetal component of acceleration an' what type! of lin$ 

will hae only linear acceleration%

23( 8ig#re !how! !ome fo#r *lin$ mechani!m! in which the fig#re! in'icate the 'imen!ion! in!tan'ar' #nit! of length( 9n'icate type of each mechani!m whether cran$-roc$er or 'o#"le-

roc$er(

PART-B

24( S$etch an' e,plain any two iner!ion! of !ingle !li'er cran$ chain(

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26( S$etch an' e,plain any two iner!ion! of 'o#"le !li'er cran$ chain(

25( S$etch an' e,plain any two iner!ion! of fo#r "ar chain(28. In the drag-link mechanism shown, link 2 is turning CW at the rate of 

130 rpm. Construct the

elocit! and acceleration pol!gons and compute the following" a#$, a%&, andthe angular acceleration of link $.

2.( 9n the mechani!m: a! !hown in 8ig( (/2: the cran$ 7A rotate! at 20 r(p(m( anticloc$wi!e an'

gie! motion to the !li'ing "loc$! ; an' D(

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1/( 9n the Mechani!m !hown in "elow: lin$ 3 i! moing to the left at the rate of 0(/ m?! @Con!tant(

Determine the elocity an' acceleration of point A1( in$ ength> A; = 0(/25 m an' ;C = 0(/25