Applied Mechanics MCQs with answers Page - 46

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Q. The time required to stop a car moving with a velocity 20 m/sec within a distance of 40 m is equal to

  • (A) 8 sec
  • (B) 107 dynes
  • (C) 1200,000 kg
  • (D) 932,000 kg

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Q. If span is 150 mts and sag is 10 ft of a cable carrying a load of 3200 kg per horizontal metre then tension of ends is

  • (A) 104,000 kg
  • (B) 10 cm
  • (C) 12.5 cm
  • (D) 20 cm

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Q. A cube of wood supporting 200 gm mass just floats in water. When the mass is removed, the cube rises by 2 cm the side of the cube will be

  • (A) 5 cm
  • (B) A particle moving in gravitational field
  • (C) Frictional movement of a particle over a surface
  • (D) Frictionless movement of a principle over a surface

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Q. The principle of conservation of energy cannot be applied in case of

  • (A) Flow of water in a pipe
  • (B) 4 sec
  • (C) 2 sec
  • (D) 5 sec

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Q. A ball weighing 250 gm is thrown vertically upwards with a velocity of 980 cm/sec. The time that the ball will take to return back to earth would be

  • (A) 1 sec
  • (B) 573 tonnes
  • (C) 286.5 tonnes
  • (D) 50 tonnes

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Q. In above problem the resultant reaction between the cannon and the ground would be

  • (A) 1146 tonnes
  • (B) Work
  • (C) 107 dynes
  • (D) Power

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Q. ML2T-2 could be the dimension of all of the following EXCEPT

  • (A) Energy
  • (B) Metre
  • (C) Picometre
  • (D) 107 dynes

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Q. Femtometre x Nanometer x (Gigametre)2 =

  • (A) Micrometre
  • (B) 24?
  • (C) 48?
  • (D) 76?

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Q. When horizontal range of a projectile equal to the distance through which projectile will rise, then the angle of projection of the particle will be equal to

  • (A) 36?
  • (B) 2.2 km/s
  • (C) 5.6 km/s
  • (D) 1 km/s

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Q. The excape velocity on the surface of the earth is

  • (A) 11.2 km/s
  • (B) The point of application of the resultant of gravity and buoyancy forces of the body
  • (C) The same as centre of gravity
  • (D) The metacentre of the body

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