Machine Kinematics

Velocity of a Point on a Link by Relative Velocity Method

Question 1
Marks : +2 | -2
Pass Ratio : 100%
The instantaneous centers of a slider moving in a linear guide lies at
pin joints
their point of contact
infinity
none of the mentioned
Explanation:
The instantaneous centers of a slider moving in a linear guide lies at infinity.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
According to Kennedy’s theorem the instantaneous centres of three bodies having relative motion lie on a
curved path
straight line
point
none of the mentioned
Explanation:
The Aronhold Kennedy’s theorem states that if three bodies move relatively to each other, they have three instantaneous centres and lie on a straight line.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
The linear velocity of a point relative to another point on the same link is ……….. to the line joining the points.
perpendicular
parallel
at 450
none of the mentioned
Explanation:
The total linear acceleration of a particle can be obtained by combining the two mutually perpendicular accelerations.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
The velocity of piston in a reciprocating pump mechanism depends upon
angular velocity of the crank
radius of the crank
length of the connecting rod
all of the mentioned
Explanation:
None.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
The linear velocity of a point B on a link rotating at an angular velocity ω relative to another point A on the same link is
ω2AB
ωAB
ω(AB)2
ω/AB
Explanation:
None.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
The linear acceleration of a rotating body is given by the relation
a = rα
a = r/α
a = α/r
a = α2/r
Explanation:
The linear velocity of a rotating body is given by the relation v = rω
Question 7
Marks : +2 | -2
Pass Ratio : 100%
The linear velocity of a rotating body is given by the relation
v = rω
v = r/ω
v = ω/r
v = ω2/r
Explanation:
The linear velocity of a rotating body is given by the relation v = rω
Question 8
Marks : +2 | -2
Pass Ratio : 100%
The instantaneous centre is a point which is always fixed.
True
False
Explanation:
The instantaneous center is not always fixed.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
The angular velocity of a rotating body is expressed in terms of
revolution per minute
radians per second
any one of the mentioned
none of the mentioned
Explanation:
Angular velocity is expressed both as revolution per minute and radians per second.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
The relation between linear velocity and angular velocity of a cycle
exists under all conditions
does not exist under all conditions
exists only when it does not slip
exists only when it moves on horizontal plane
Explanation:
None.