Kinematics

7 Questions | Total Attempts: 88

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Kinematics Quizzes & Trivia

Objective quiz for iitjee


Questions and Answers
  • 1. 
    As an object falls freely in vacuum, its
    • A. 

      1velocity increases

    • B. 

      2acceleration increases

    • C. 

      3both velocity and acceleration increases

    • D. 

      4only distance increases

  • 2. 
    A ball is thrown upwards and caught when it comes back down. In the presence of air resistance, the speed of the ball when caught would be
    • A. 

      Less than the speed it had when thrown upwards.

    • B. 

      More than the speed it had when thrown upwards.

    • C. 

      The same as the speed it had when thrown upwards.

  • 3. 
    Suppose an object is in free fall. Each second the object falls
    • A. 

      The same distance as in the second before.

    • B. 

      A larger distance as in the second before.

    • C. 

      With the same average speed

    • D. 

      With the same instantaneous speed.

  • 4. 
    A point mass of 1 kg collides elastically with a stationary point mass of 5 kg. After their collision, the 1 kg mass reverses its direction and moves with a speed of 2 ms−1. Which of the following statement(s) is (are) correct for the system of these two masses?
    • A. 

      Total momentum of the system is 3 kg ms−1

    • B. 

      Momentum of 5 kg mass after collision is 4 kg ms−1

    • C. 

      Kinetic energy of the centre of mass is 0.80 J

    • D. 

      Total kinetic energy of the system is 4J

  • 5. 
    A student uses a simple pendulum of exactly 1m length to determine g, the acceleration due to gravity. He uses a stop watch with the least count of 1 sec for this and records 40 seconds for 20 oscillations. For this observation, which of the following statement(s) is (are) true?
    • A. 

      Error in measuring T, the time period, is 0.04 seconds

    • B. 

      Error in measuring T, the time period, is 1 second

    • C. 

      Percentage error in the determination of g is 5%

    • D. 

      Percentage error in the determination of g is 2.5%

  • 6. 
    At the highest point of flight of a ball thrown upwards,
    • A. 

      The acceleration is zero.

    • B. 

      The acceleration is the minimal.

    • C. 

      the acceleration is directed downwards

    • D. 

      the acceleration is directed upward

  • 7. 
    A free falling object is dropped from a height from rest. After falling for 1 second, the speed is about
    • A. 

      5m/s

    • B. 

      4.9m/s

    • C. 

      10m/s

    • D. 

      9.8m/s