500 Best Applied Mechanics MCQ
Q121). For a particle moving with a simple harrmonic motion, the frequency is
a).directly proportional to periodic time
b).inversely proportional to periodic time
c).inversely proportional to its angular velocity
d).directly proportional to its angular velocity
Correct Answer:
inversely proportional to periodic time
Explanation:
Q122). According to Kennedy’s theorem, if three bodies have plane motions, their instantaneous centres lie on
a).a point
b).a straight line
c).two straight lines
d).a triangle.
Correct Answer:
a straight line
Explanation:
Q123). A ball of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/sec hits an identical stationary ball B on the table. If the impact is perfectly plastic, the velocity of the ball B just after impact would be
a).zero
b).5 m/sec
c).10 m/sec
d).none of these.
Correct Answer:
zero
Explanation:
Q124). Energy may be defined as
a).power of doing work
b).capacity of doing work
c).rate of doing work
d).all the above.
Correct Answer:
capacity of doing work
Explanation:
Q125). A ball which is thrown upwards, returns to the ground describing a parabolic path during its flight
a).vertical component of velocity remains constant
b).horizontal component of velocity remains constant
c).speed of the ball remains constant
d).kinetic energy of the ball remains constant.
Correct Answer:
horizontal component of velocity remains constant
Explanation:
Q126). Angular acceleration of a particle may be expressed as
a).radians/sec^2
b).degrees/sec^2
c).revolutions/sec
d).all the above.
Correct Answer:
all the above.
Explanation:
Q127). A stone is whirled in a vertical circle, the tension in the string, is maximum
a).when the string is horizontal
b).when the stone is at the highest position
c).when the stone is at the lowest position
d).at all the positions.
Correct Answer:
when the stone is at the lowest position
Explanation:
Q128). If a spherical body is symmetrical about its perpendicular axes, the moment of inertia of the body about an axis passing through its centre of gravity as given by Routh’s rule is obtained by dividing the product of the mass and the sum of the squares of two semi-axes by n where n is
a).2
b).3
c).4
d).5
Correct Answer:
5
Explanation: