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MCQs

Total Questions : 1033 | Page 103 of 104 pages
Question 1021. The necessary condition for forces to be in equilibrium is that these should be
  1.    Coplanar & Meet at one point
  2.    Meet at one point
  3.    All be equal
  4.    Coplanar
 Discuss Question
Answer: Option A. -> Coplanar & Meet at one point
Question 1022. Which of the following do not have identical dimensions?
  1.    Momentum and impulse
  2.    Moment of a force and angular momentum
  3.    Torque and work
  4.    Torque and energy
 Discuss Question
Answer: Option B. -> Moment of a force and angular momentum
Question 1023. Dynamic friction as compared to static friction is
  1.    may be less of more depending on nature of surfaces and velocity
  2.    less
  3.    more
  4.    same
 Discuss Question
Answer: Option B. -> less
Question 1024. The co-efficient of friction depends upon
  1.    shape of the surfaces
  2.    All of the listed here
  3.    nature of surfaces
  4.    area of contact
 Discuss Question
Answer: Option C. -> nature of surfaces
Question 1025. A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to
  1.    100
  2.    25
  3.    250
  4.    50
 Discuss Question
Answer: Option D. -> 50
Question 1026. The center of gravity of a triangle lies at the point of
  1.    Concurrence of the medians
  2.    Intersection of bisector of angles
  3.    Intersection of diagonals
  4.    Intersection of its altitudes
 Discuss Question
Answer: Option A. -> Concurrence of the medians
Question 1027. The resultant of the following three couples 20 kg force, 0.5 m arm, + ve sense 30 kg force, 1 m arm, – ve sense 40 kg force, 0.25 m arm, + ve sense having arm of 0.5 m will be
  1.    20 kg, + ve sense
  2.    20 kg, - ve sense
  3.    10 kg, - ve sense
  4.    10 kg, + ve sense
 Discuss Question
Answer: Option B. -> 20 kg, - ve sense
Question 1028. The center of gravity of a uniform lamina lies at
  1.    All of these
  2.    the bottom surface
  3.    the mid point of its axis
  4.    the center of heavy portion
 Discuss Question
Answer: Option C. -> the mid point of its axis
Question 1029. A particle inside a hollow sphere of radius r, having coefficient of friction -rr can rest upto height of
  1.    r/2
  2.    r/%
  3.    0.134 r
  4.    r/A
 Discuss Question
Answer: Option C. -> 0.134 r
Question 1030. The center of percussion of the homogeneous rod of length L suspended at the top will be
  1.    2L/3
  2.    L/2
  3.    3L/4
  4.    L/3
 Discuss Question
Answer: Option A. -> 2L/3

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