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Free download in PDF Machine Kinematics - Kinematics of Motion Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like UPSC, NDA, SSC etc. These short solved questions or quizzes are provided by Gkseries./p>
(1)
The force which acts along the radius of a circle and directed ____________ the centre of the circle is known as centripetal force.
[A]
away from
[B]
towards
[C]
at the
[D]
none of the mentioned
(2)
The unit of mass moment of inertia in S.I. units is
[A]
m4
[B]
kgf-m-s2
[C]
kg-m2
[D]
N-m
(3)
Joule is a unit of
[A]
force
[B]
work
[C]
power
[D]
none of the mentioned
(4)
The energy possessed by a body, for doing work by virtue of its position, is called
[A]
potential energy
[B]
kinetic energy
[C]
electrical energy
[D]
chemical energy
(5)
When a body of mass moment of inertia I (about a given axis) is rotated about that axis with an angular velocity, then the kinetic energy of rotation is
[A]
0.5 I.ω
[B]
I.ω
[C]
0.5 I.ω2
[D]
I.ω2
(6)
The wheels of a moving car possess
[A]
potential energy only
[B]
kinetic energy of translation only
[C]
kinetic energy of rotation only
[D]
kinetic energy of translation and rotation both.
Answer: kinetic energy of translation and rotation both.
(7)
The bodies which rebound after impact are called
[A]
inelastic bodies
[B]
elastic bodies
[C]
solid bodies
[D]
none of the mentioned
(8)
The coefficient of restitution for inelastic bodies is
[A]
zero
[B]
between zero and one
[C]
one
[D]
more than one
(9)
Which of the following statement is correct ?
[A]
The kinetic energy of a body during impact remains constant.
[B]
The kinetic energy of a body before impact is equal to the kinetic energy of a body after impact.
[C]
The kinetic energy of a body before impact is less than the kinetic energy of a body after impact.
[D]
The kinetic energy of a body before impact is more than the kinetic energy of a body after impact.
Answer: The kinetic energy of a body before impact is more than the kinetic energy of a body after impact.
(10)
A body of mass m moving with a constant velocity v strikes another body of same mass m moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is
[A]
v
[B]
2 v
[C]
4 v
[D]
8 v
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