Applied Mechanics MCQs with answers Page - 10

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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) 1200,000 kg
  • (C) 932,000 kg
  • (D) 584,000 kg

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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) 2 sec
  • (C) 4 sec
  • (D) 10 sec

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Q. A grinding wheel is rotating at 3000 rpm. When the switch is turned off the wheel stops in 10 seconds. The uniform deceleration of the wheel was

  • (A) 1 rad/s2
  • (B) 31.4 rad/s2
  • (C) 4 rad/s2
  • (D) 62.8 rad/s2

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Q. Which of the following is an example of a projectile?

  • (A) Launching of a satellite
  • (B) Taking off of an aircraft
  • (C) Lifting of a balloon
  • (D) Throwing of a cricket ball by a player

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Q. A body is vibrating with simple harmonic motion of aplitude 5 cm frequency 10 vibrations per second. The maximum value of velocity in cm/s will be

  • (A) 3.14 cm/s
  • (B) 314 cm/s
  • (C) 3140 cm/s
  • (D) 31.4 cm/s

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Q. Which of the following statement is incorrect?

  • (A) A body can have energy without having momentum
  • (B) A body cannot have kinetic energy without having momentum
  • (C) A body in motion will always have kinetic energy more than the potential energy
  • (D) None of the above

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Q. The value of acceleration due to gravity is 980 cm/sec2. Its value in meter per (hour)2 will be

  • (A) 1.27 x 108
  • (B) 127
  • (C) 1270
  • (D) 1.27 x 107

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Q. The torque acting on a system is zero. Which of the following will be conserved?

  • (A) Angular velocity
  • (B) Linear momentum
  • (C) Angular momentum
  • (D) Moment of inertia

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Q. Our weight will be zero under all of the following conditions EXCEPT

  • (A) We are at the centre of the earth
  • (B) When we are ascending in a lift with acceleration of 4.9 m/so
  • (C) We are orbiting in a satellite
  • (D) When we are freely faling

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Q. A clock with a second pendulum is gaining 5 minutes a day. To correct it

  • (A) The eccentricity of bob with pendulum should be decreased
  • (B) The length of the pendulum should be decreased
  • (C) The length of pendulum should not be changed
  • (D) The length of the pendulum should be increased

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