Applied Mechanics MCQs with answers Page - 13

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Q. The forces which meet at one point but their lines of action do not lie in one plane, are called

  • (A) Coplanar noncurrent forces
  • (B) Non-coplanar nonconcurrent forces
  • (C) Intersecting forces
  • (D) Coplanar concurrent forces

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Q. The common acceleration will be

  • (A) 1.5 m/s2
  • (B) 1.0 m/s2
  • (C) 6 m/s2
  • (D) 3 m/s2

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Q. The locus of instantaneous centre of a moving rigid body

  • (A) Epicycloid
  • (B) Straight line
  • (C) Cycloid
  • (D) Centrode

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Q. When all the forces acting on a body lie in one plane and their lines of action meet at one point, the forces

  • (A) constitute a moment
  • (B) constitute a couple
  • (C) are known as coplaner-concurrent forces
  • (D) are known as non-coplaner forces

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Q. A force F = 2i + 3j - k is passing through the origin. Its moment about point (1, 1, 0) is

  • (A) Zero
  • (B) 2i + 3j
  • (C) i - j - k
  • (D) i + j

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Q. When two concurrent and coplaner forces P and Q act at an angle of 180?, their resultant will be a

  • (A) moment equal to PQ
  • (B) couple
  • (C) (P-Q)
  • (D) zero

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Q. A man lifts a stone weighting 300 g from the ground to a height of 2m and throws it horizontally with a velocity of 6 m/sec. The work done by the man is

  • (A) 7.686 J
  • (B) 11.286 J
  • (C) 5.886 J
  • (D) 8.343 J

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Q. A body of weight 100 kg is placed on a horizontal plane. A horizontal force of 30 kg is applied and the block is just on the point of motion. The angle of friction is

  • (A) About 16o
  • (B) 30o
  • (C) 45o
  • (D) 60o

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Q. If the above tape weights 0.001 kg/ft, sag is

  • (A) 2.73 ft
  • (B) 3.13 ft
  • (C) 2.90 ft
  • (D) 3.03 ft

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Q. A body whose true weight is 14 kg appears to weigh 15 kg when weighed with the help of a spring balance in a moving lift. The acceleration of the lift at the time was

  • (A) 1 m/sec2
  • (B) 0.7 m/sec2
  • (C) 0.5 m/sec2
  • (D) 1.4 m/sec2

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