Physics - Mechanics Final Test

6 Questions  I  By Jianghui
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 Physics - Mechanics Final Test
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  • 1. 
    Using a stop-watch, Tom measured the time for a motor car to pass through 2 streetlights. The reading was 1.2 s. If the reaction time of Tom is 0.2 s, what is the maximum possible percentage error of his measurement?
    • A. 

      8.33%

    • B. 

      16.7%

    • C. 

      33.3%

    • D. 

      66.7%


  • 2. 

    A boy throws a ball vertically upwards as shown.  What is the displacement of the ball when it returns to its starting point?
    • A. 

      0 m

    • B. 

      5 m

    • C. 

      5 m upwards then 5 m downwards

    • D. 

      10 m


  • 3. 

    In the following figure, a ball runs on a smooth rail from P to Q. Which of the following graphs best represents the variation of the distance d travelled by the ball with time t?       
    • A. 

      Graph A

    • B. 

      Graph B

    • C. 

      Graph C

    • D. 

      Graph D


  • 4. 

    Balls A and B are thrown vertically upwards and downwards respectively. If their initial speeds are the same, which of the following statements is/are correct when they meet?           (1)  Their displacements should be the same.           (2)  Their speeds should be the same.           (3)  Their accelerations should be the same.
    • A. 

      (1) only

    • B. 

      (3) only

    • C. 

      (1) and (3) only

    • D. 

      (1) and (3) only


  • 5. 

    The following graph shows that quantity X is directly proportional to time t.           Which of the following can be the quantity X?           (1)  Velocity of a freely falling object with negligible air resistance.           (2)  Displacement of an object moving at constant velocity.           (3)  Distance travelled by an object moving with constant acceleration.
    • A. 

      (1) and (2) only

    • B. 

      (1) and (3) only

    • C. 

      (2) and (3) only

    • D. 

      (1), (2) and (3)


  • 6. 

    In the figure below, a cannon-ball has been fired from a cannonWhich of the following figures best shows the direction of the resultant force acting on the cannon-ball at different time?
    • A. 

      Picture A

    • B. 

      Picture B

    • C. 

      Picture C

    • D. 

      Picture D


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