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MCQs

Total Questions : 1284 | Page 7 of 129 pages
Question 61. ‘μ’ is coefficient of friction. a wheeled vehicle travelling on a circular level track will slip and overturn simultaneously if the ratio of its wheel distance to the height of its centroid, is
  1.     μ
  2.     2μ
  3.     3μ
  4.     ½μ
 Discuss Question
Answer: Option B. ->  2μ
Question 62. If ‘α’ is the angular acceleration of a compound pendulum whose angular displacement is ‘θ’, the frequency of the motion is
  1.     2π √(α/θ)
  2.     (1/2π) √(α/θ)
  3.     4π √(α/θ)
  4.     2π √(α - θ)
 Discuss Question
Answer: Option B. ->  (1/2π) √(α/θ)
Question 63. If ‘α’ is the angular acceleration of a compound pendulum whose angular displacement is ‘θ’, the frequency of the motion is
  1.     2π √(α/θ)
  2.     (1/2π) √(α/θ)
  3.     4π √(α/θ)
  4.     2π √(α - θ)
 Discuss Question
Answer: Option B. ->  (1/2π) √(α/θ)
Question 64. If ‘α’ is the angular acceleration of a compound pendulum whose angular displacement is ‘θ’, the frequency of the motion is
  1.     2π √(α/θ)
  2.     (1/2π) √(α/θ)
  3.     4π √(α/θ)
  4.     2π √(α - θ)
 Discuss Question
Answer: Option B. ->  (1/2π) √(α/θ)
Question 65. If ‘α’ is the angular acceleration of a compound pendulum whose angular displacement is ‘θ’, the frequency of the motion is
  1.     2π √(α/θ)
  2.     (1/2π) √(α/θ)
  3.     4π √(α/θ)
  4.     2π √(α - θ)
 Discuss Question
Answer: Option B. ->  (1/2π) √(α/θ)
Question 66. If ‘α’ is the angular acceleration of a compound pendulum whose angular displacement is ‘θ’, the frequency of the motion is
  1.     2π √(α/θ)
  2.     (1/2π) √(α/θ)
  3.     4π √(α/θ)
  4.     2π √(α - θ)
 Discuss Question
Answer: Option B. ->  (1/2π) √(α/θ)
Question 67. The centre of gravity of a triangle is at the point where three
  1.    Medians of the triangle meet
  2.    Perpendicular bisectors of the sides of the triangle meet
  3.    Bisectors of the angle of the triangle meet
  4.    None of these
 Discuss Question
Answer: Option A. -> Medians of the triangle meet
Question 68. 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
  1.    Zero
  2.    5 m/sec
  3.    10 m/sec
  4.    None of these
 Discuss Question
Answer: Option A. -> Zero
Question 69. If a flywheel increases its speed from 10 rpm to 20 rpm in 10 seconds, then its angular acceleration is
  1.    —rad/sec 10
  2.    —rad/sec 20
  3.    —rad/sec 30
  4.    none of the above
 Discuss Question
Answer: Option C. -> —rad/sec 30
Question 70. Ball ‘A’ of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/s hits an identical stationary ball ‘B’ on the table. If the impact is perfectly elastic, the velocity of the ball ‘B’ just after impact would be
  1.    Zero
  2.    5 m/sec
  3.    10 m/sec
  4.    None of these
 Discuss Question
Answer: Option C. -> 10 m/sec

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