Note : Answer all questions from Part ? A. Answer any five Questiona from
Part ?13.
PART A (Marks a 25)
1. State Lami's theorem. 2 .
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What are the different conditions of equilibrium 9 23. State Pappu's Theorem 1 and
4. Differentiate static friction and dynamic friction.
. State perpendicular axis theorem.
6. The notion of a particle is defined by the relation x= t
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412t
2
? 40. Where x
is expressed in metres and t in sec. Determine the position velocity and
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acceleration when t = 5 sec.Determine the force P that will give the body, shown below an acceleration
of 0.25 g. mise6
2
. The coefficient of kinetic friction is 022.
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. Derive work-energy principle.9: A body .weighing 80 Nis pulled up on a smooth plane by a force '1=
0
a
shown. Determipe the velocity-of jhe block -after '5 sec.
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10. Differentiate direct central impact and oblique central impact.(This paper contains 3 pages) P.T.O.
3
,
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23
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35
Code No. : 3317/N
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FACULTY OF ENGINEERING & INFORMATICSD.E. I Year (New) (Common to all branches) (Main) Examination, June 2011
ENGINEERING MECHANIC
Time : 3 Hours I [ Max. Marks : 75
Note : Answer all questions from Part ? A. Answer any five Questiona from
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Part ?13.PART A (Marks a 25)
1. State Lami's theorem. 2 .
What are the different conditions of equilibrium 9 2
3. State Pappu's Theorem 1 and
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4. Differentiate static friction and dynamic friction.. State perpendicular axis theorem.
6. The notion of a particle is defined by the relation x= t
4
12t
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2? 40. Where x
is expressed in metres and t in sec. Determine the position velocity and
acceleration when t = 5 sec.
Determine the force P that will give the body, shown below an acceleration
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of 0.25 g. mise62
. The coefficient of kinetic friction is 022.
. Derive work-energy principle.
9: A body .weighing 80 Nis pulled up on a smooth plane by a force '1=
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0a
shown. Determipe the velocity-of jhe block -after '5 sec.
10. Differentiate direct central impact and oblique central impact.
(This paper contains 3 pages) P.T.O.
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3,
2
3
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A220N
AC = 5 rn
CD = 3 m
DE3=.4m
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110 NCode No 3317/N
PART ? B (Marks : 50)
11, (a) Find the tesultant of a system of force. 5
1.5 N. 6 N 2N 5
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-N
16 N,
45
1 m 1 m
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im 1 m
(b) A bar. 12 m long and of negligible weight is acted upon by forces as
shown in Fig. Determine angle 0 for equilibrium of bar 5
?
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. A circular disc of 250,mm radiue is removed from a circular disc of 500 mmradius as shown.below. Cehtre, of both lines are on same 'horizontal line
r
centrolq.
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. .13. Block A weighing 1100 N rests over block E3 thaweights 2200 N as shown.
Blbck A is tied to wall with a horizontal string. If M between A and B is 1/4
and between B and?floor is 1/3. What should be the value of P to move the
block B if 10
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(a) P is horizontal(b) P acts 40? upwards to horizontal ?
2
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35
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Code No. : 3317/NFACULTY OF ENGINEERING & INFORMATICS
D.E. I Year (New) (Common to all branches) (Main) Examination, June 2011
ENGINEERING MECHANIC
Time : 3 Hours I [ Max. Marks : 75
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Note : Answer all questions from Part ? A. Answer any five Questiona fromPart ?13.
PART A (Marks a 25)
1. State Lami's theorem. 2 .
What are the different conditions of equilibrium 9 2
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3. State Pappu's Theorem 1 and4. Differentiate static friction and dynamic friction.
. State perpendicular axis theorem.
6. The notion of a particle is defined by the relation x= t
4
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12t2
? 40. Where x
is expressed in metres and t in sec. Determine the position velocity and
acceleration when t = 5 sec.
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Determine the force P that will give the body, shown below an accelerationof 0.25 g. mise6
2
. The coefficient of kinetic friction is 022.
. Derive work-energy principle.
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9: A body .weighing 80 Nis pulled up on a smooth plane by a force '1=0
a
shown. Determipe the velocity-of jhe block -after '5 sec.
10. Differentiate direct central impact and oblique central impact.
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(This paper contains 3 pages) P.T.O.3
,
2
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3A
220N
AC = 5 rn
CD = 3 m
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DE3=.4m110 N
Code No 3317/N
PART ? B (Marks : 50)
11, (a) Find the tesultant of a system of force. 5
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1.5 N. 6 N 2N 5-
N
16 N,
45
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1 m 1 mi
m 1 m
(b) A bar. 12 m long and of negligible weight is acted upon by forces as
shown in Fig. Determine angle 0 for equilibrium of bar 5
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?. A circular disc of 250,mm radiue is removed from a circular disc of 500 mm
radius as shown.below. Cehtre, of both lines are on same 'horizontal line
r
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centrolq.. .
13. Block A weighing 1100 N rests over block E3 thaweights 2200 N as shown.
Blbck A is tied to wall with a horizontal string. If M between A and B is 1/4
and between B and?floor is 1/3. What should be the value of P to move the
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block B if 10(a) P is horizontal
(b) P acts 40? upwards to horizontal ?
2
Code No. : 3317/N
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14. Find the product of inertia for hatched area about the axes XY and y.10
10 mm
60 mm
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46 mm t 3D mm
15. An elevator of gross weight of 5 kN starts to more upwards with a constant
acceleration and acquires a velocity of 2 m/sec after travelling a distance of
3 m. Find the pull in cable during accelerated motion. If the elevator while
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stopping moves with a constant deceleration from a constant velocity of2 misec and ,comes to rest in 2 sec. Calculate the pressure exerted by a
man weighted: up: 800 N to the floor'during stopping. 10
16: Two bodies of weight W
A
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= 8.
50 N and W
B
= 500 N are connected to the
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two ends of light inextensible string, passing over smooth pulley. Theweight W
A
is placed on rpugh horizontal surface whose co-efficient of
friction is 0.25 and W
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Bis hanging vertically in air. If the system is released
from rest and block 'B' falls through a vertical distance of 2.5 m; dete
.
rmine
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the yelocity attained by4
13
;
3 10
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17. (a) State the principle of impulse momentum.(b) Three balls A, B and C masses 12.5 kg,'26 kg and 55 kg respectively
move along the same straight line and in the;
,
same direction with
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v,elocities of 16 m/sec, 4 m/sec and 3 m/sec. if 'A' collides with '13' andsubsequently I3,! collides with C.. Find the final velocities. Assume
perfectly elastic impacts.
3 6,200
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