Machine Kinematics Questions and Answers – Acceleration in Mechanisms

This set of Machine Kinematics Multiple Choice Questions & Answers (MCQs) focuses on “Acceleration in Mechanisms”.

1. The instantaneous centers of a slider moving in a curved surface lies at
a) infinity
b) their point of contact
c) the center of curvature
d) the pin point
View Answer

Answer: c
Explanation: The instantaneous centers of a slider moving in a linear guide lies at infinity.
The instantaneous centers of a slider moving in a curved surface lies at the center of curvature.

2. The fixed instantaneous center of mechanism
a) varies with the configuration
b) remains at the same place for all configurations
c) all of the mentioned
d) none of the mentioned
View Answer

Answer: b
Explanation: The fixed instantaneous center of mechanism remains at the same place for all configurations.
The instantaneous centres which vary with the configuration of the mechanism, are called neither fixed nor permanent instantaneous centres.

3. The instantaneous center of rotation of a circular disc rolling on a straight path is
a) at the center of the disc
b) at their point of contact
c) at the center of gravity of the disc
d) at infinity
View Answer

Answer: b
Explanation: The space centrode of a circular disc rolling on a straight path is a straight line.
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4. The locus of instantaneous center of a moving body relative to a fixed body is known as the
a) space centrode
b) body centrode
c) moving centrode
d) none of the mentioned
View Answer

Answer: a
Explanation: The locus of the instantaneous centre in space during a definite motion of the body is called the space centrode and the locus of the instantaneous centre relative to the body itself is called the body centrode.

5. The space centrode of a circular disc rolling on a straight path is
a) circle
b) parabola
c) a straight line
d) none of the mentioned
View Answer

Answer: c
Explanation: The instantaneous center of rotation of a circular disc rolling on a straight path is at their point of contact.
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6. The component of the acceleration directed towards the center of rotation of a revolving body is known as ____________ component.
a) tangential
b) centripetal
c) coriolis
d) none of the mentioned
View Answer

Answer: b
Explanation: The centripetal or radial component, which is perpendicular to the velocity of the particle at the given instant.
The tangential component, which is parallel to the velocity of the particle at the given instant.

7. At an instant the link AB of length r has an angular velocity ω and an angular acceleration α. What is the total acceleration of AB?
a) [(ω2r)2 + αr)2]1/2
b) [(ωr)2 + αr)2]1/2
c) [(ω2r)2 + αr)]1/2
d) [(ω2r)2 + αr)2]1/2
View Answer

Answer: a
Explanation: None.
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8. At an instant, if the angular velocity of a link is clockwise then the angular acceleration will be
a) clockwise
b) counterclockwise
c) in any direction
d) none of the mentioned
View Answer

Answer: c
Explanation: None.

9. Angular acceleration of a link AB is given by
a) centripetal acceleration/length
b) tangential acceleration/length
c) total acceleration/length
d) none of the mentioned
View Answer

Answer: b
Explanation: None.
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10. A slider moves with uniform velocity v on a revolving link of length r with angular velocity of ω. The Coriolis acceleration component of a point on the slider relative to a coincident point on the link is equal to
a) 2rω parallel to the link
b) 2ωv perpendicular to the link
c) 2rω perpendicular to the link
d) 2ωv parallel to the link
View Answer

Answer: b
Explanation: The coriolis component is always perpendicular to the link and is given by 2ωv.

Sanfoundry Global Education & Learning Series – Machine Kinematics.
To practice all areas of Machine Kinematics, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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