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MCQs

Total Questions : 1284 | Page 127 of 129 pages
Question 1261. The torque produced by a force depends on(i) The magnitude of the force(ii) The direction of the force(iii) The point of application of the force relative to origin
  1.    All (i), (ii) and (iii)
  2.    Only (i)
  3.    Both (i) and (ii)
  4.    Both (i) and (iii)
 Discuss Question
Answer: Option A. -> All (i), (ii) and (iii)
Question 1262. A rope is wrapped twice around a rough pole with a coefficient of friction ‘A . It is subjected to a force Fj at one end and a gradually increasing force F2 is applied at the other end till the rope just starts slip-ping. At this instant the ratio of F2 to Fi is
  1.    e2*
  2.    1
  3.    e*72
  4.    e4*
 Discuss Question
Answer: Option A. -> e2*
Question 1263. A shell travelling with a horizontal velocity of 100 m/sec explodes and splits into two parts, one of mass 10 kg and the other of 15 kg. The 15 kg mass drops vertically downward with initial velocity of 100 m/sec and the 10 kg mass begins to travel at an angle to the horizontal of tan”1 x, where x is
  1.    4/5
  2.    3/4
  3.    3/5
  4.    5/3
 Discuss Question
Answer: Option C. -> 3/5
Question 1264. The time period of a simple pendulum depends on(i) Mass of suspended particle(ii) Length of the pendulum(iii) Acceleration due to gravity
  1.    Both (i) and (iii)
  2.    All are correct
  3.    Only (i)
  4.    Both (ii) and (iii)
 Discuss Question
Answer: Option D. -> Both (ii) and (iii)
Question 1265. If two forces are in equilibrium, then the forces must(i) Be equal in magnitude(ii) Be opposite in sense(iii) Act along the same line
  1.    All (i), (ii) and (iii)
  2.    (i) and (ii)
  3.    Only (i)
  4.    (i) and (iii)
 Discuss Question
Answer: Option A. -> All (i), (ii) and (iii)
Question 1266. Two balls of masses 3 kg and 6 kg are moving with velocities of 4 m/sec and 1 m/sec respectively, towards each other along the line of their centers. After impact the 3 kg ball comes to rest. This can happen only if the coefficient of restitution between the balls is
  1.    1/3
  2.    1/5
  3.    3/5
  4.    2/3
 Discuss Question
Answer: Option B. -> 1/5
Question 1267. One end of a light string 4 m in length is fixed to a point on a smooth wall and the other end fastened to a point on the surface of a smooth sphere of diameter 2.25 m and of weight 100 kg. The reaction between the sphere and the wall of the arrangement made is
  1.    110 kg
  2.    108.5 kg
  3.    105.5 kg
  4.    102.5 kg
 Discuss Question
Answer: Option D. -> 102.5 kg
Question 1268. A bullet weighing 200 g is fired horizontally with a velocity of 25 m/sec from a gun carried on a carriage which together with the gun weighs 100 kg
  1.    0.01 m/sec
  2.    0.05 m/sec
  3.    1.00 m/sec
  4.    1.5 m/see
 Discuss Question
Answer: Option B. -> 0.05 m/sec
Question 1269. On a ladder resisting on a smooth ground and leaning against a rough vertical wall, the force of friction acts
  1.    Towards the wall at its upper end
  2.    Away from the wall at its upper end
  3.    Upwards at its upper end
  4.    Downwards at its upper end
 Discuss Question
Answer: Option C. -> Upwards at its upper end
Question 1270. A load of 500 kg was lifted through a distance of 13 cm
  1.    50%
  2.    40%
  3.    55%
  4.    30%.
 Discuss Question
Answer: Option B. -> 40%

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