Newton's Laws Of Motion

10 Questions | Total Attempts: 39

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Newtons Law Quizzes & Trivia

Questions and Answers
  • 1. 
    Swimming is possible on account of
    • A. 

      First law of motion

    • B. 

      Second law of motion

    • C. 

      Third law of motion

    • D. 

      Newton's law of gravitation

  • 2. 
     A man of weight 75 kg is standing in an elevator which is moving with an acceleration of 5 m/s in upward direction the apparent weight of the man will be (g=10)
    • A. 

      1425 N

    • B. 

      1250 N

    • C. 

      1375 N

    • D. 

      1125 N

  • 3. 
    Rocket engines lift a rocket from the earth surface because hot gas with high velocity
    • A. 

      Push against the earth

    • B. 

      React against the rocket and push it up

    • C. 

      Push against the air

    • D. 

      Heat up the air which lifts the rocket

  • 4. 
    A rope of length 5m is kept on frictionless surface and a force of 5N is applied to one of its end. Find tension in the rope at 1m from this end
    • A. 

      1 N

    • B. 

      4 N

    • C. 

      5 N

    • D. 

      3 N

  • 5. 
    A body of mass 2 kg moving on a horizontal surface with an initial velocity of 4 m/sec comes to rest after 2 sec. If one wants to keep this body moving on the same surface with a velocity of 4 m/sec, the force required is
    • A. 

      8 N

    • B. 

      Zero

    • C. 

      4 N

    • D. 

      2 N

  • 6. 
    A parachutist of weight ‘w’ strikes the ground with his legs fixed and comes to rest with an upward acceleration of magnitude 3 g. Force exerted on him by ground during landing is
    • A. 

      W

    • B. 

      3w

    • C. 

      2w

    • D. 

      4w

  • 7. 
    A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of 5m/s2 the reading of the spring balance will be
    • A. 

      49 N

    • B. 

      74 N

    • C. 

      24 N

    • D. 

      15 N

  • 8. 
    If force on a rocket having exhaust velocity of 300 m/sec is 210 N, then rate of combustion of the fuel is
    • A. 

      0.7 kg/s

    • B. 

      0.07 kg/s

    • C. 

      1.4 kg/s

    • D. 

      10.7 kg/s

  • 9. 
    A light spring balance hangs from the hook of the other light spring balance and a block of mass M kg hangs from the former one. Then the true statement about the scale reading is
    • A. 

      Both the scales read M/2 kg each

    • B. 

      The scale of the lower one reads M kg and of the upper one zero

    • C. 

      Both the scales read M kg each

    • D. 

      The reading of the two scales can be anything but the sum of the reading will be M kg

  • 10. 
    Gravels are dropped on a conveyor belt at the rate of 0.5 kg/sec. The extra force required in newtons to keep the belt moving at 2 m/sec is.
    • A. 

      1

    • B. 

      4

    • C. 

      2

    • D. 

      0.5