500 Best Applied Mechanics MCQ
Q137). Kinetic friction may be defined as
a).friction force acting when the body is just about to move
b).friction force acting when the body is in motion
c).angle between normal reaction and resultant of normal reaction and limiting friction
d).ratio of limiting friction and normal reaction.
Correct Answer:
friction force acting when the body is in motion
Explanation:
Q138). The centre of gravity of a homogenous body is the point at which the whole
a).volume of the body is assumed to be concentrated
b).area of the surface of the body is assumed to be concentrated
c).weight of the body is assumed to be concentrated
d).all the above.
Correct Answer:
weight of the body is assumed to be concentrated
Explanation:
Q139). Pick up the correct statement from the following :
a).If two equal and perfectly elastic smooth spheres impinge directly, they interchange their velocities.
b).If a smooth sphere impinges on another sphere, which is at rest, the latter will move along the line of centres.
c).If two equal spheres which are perfectly elastic impinge at right angles, their direction after impact will still be at right angles.
d).All of the above.
Correct Answer:
0
Explanation:
Q140). Centre of gravity of a thin hollow cone lies on the axis of symmmetry at a height of
a).one-half of the total height above base
b).one-third of the total height above base
c).one-fourth of the total height above base
d).none of these.
Correct Answer:
one-third of the total height above base
Explanation:
Q141). A ball of mass 1 kg moving with a velocity of 2 m/sec collides a stationary ball of mass 2 kg and comes to rest after impact. The velocity of the second ball after impact will be
a).zero
b).0.5 m/sec
c).1.0 m/sec
d).2.0 m/sec.
Correct Answer:
1.0 m/sec
Explanation:
Q142). Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for
a).half oscillation
b).quarter oscillation
c).complete oscillation
d).none of these.
Correct Answer:
complete oscillation
Explanation:
Q143). The motion of a bicycle wheel is
a).translatory
b).rotary
c).rotary and translatory
d).curvilinear
Correct Answer:
rotary and translatory
Explanation:
Q144). Pick up the correct statement from the following. The kinetic energy of a body
a).before impact is equal to that after impact
b).before impact is less than that after impact
c).before impact is more than that after impact
d).remains constant
Correct Answer:
before impact is more than that after impact
Explanation: