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DP IB Physics: SL

Topic Questions

Home / IB / Physics: SL / DP / Topic Questions / 2. Mechanics / 2.1 Motion / Multiple Choice


2.1 Motion

Question 1

Marks: 1

The graph shows the results obtained by a student who designed an experiment to determine the value of the acceleration due to free fall, g, using a falling ball bearing and a pair of light gates. The value obtained is inaccurate. 

2-1--sl-mcq-hard-q1-phy

Which of the following could have contributed to the inaccurate value of g obtained by the student? 

  • Measured values of h are too large due to parallax error

  • Plotting fraction numerator 2 h over denominator t end fraction against t

  • The ball bearing colliding with the light gate when travelling through

  • An increase in measured values of t due to residual magnetism in the release mechanism

Choose your answer
  

Question 2

Marks: 1

An object is released from a stationary hot air balloon at height s above the ground. Air resistance is negligible. 

An identical object is released at the same height above the ground from another balloon that is rising at a constant speed.

Which of the following does not increase for the object released from the rising balloon? 

  • The time taken for it to reach the ground

  • The distance through which it falls

  • Its acceleration

  • The speed with which it hits the ground

Choose your answer
  
Key Concepts
Projectile Motion

Question 3

Marks: 1

An object is projected in a vacuum chamber and in a playing field (where air resistance is taken into account). Otherwise, all initial conditions are equivalent. 

Which graph shows correct trajectory for the object in the vacuum chamber and in the playing field? 

2-1--sl-mcq-hard-q3-phy

    Choose your answer
      

    Question 4

    Marks: 1

    A projectile is fired from level ground with speed v at an angle θ to the ground. Ignoring air resistance, which of the following is a correct expression for the maximum height reached by the projectile?

    • fraction numerator v squared space sin squared space theta over denominator g end fraction

    • fraction numerator v space sin squared space theta over denominator 2 g end fraction

    • fraction numerator v squared space sin squared space theta over denominator 2 g end fraction

    • fraction numerator v space sin squared space theta over denominator g end fraction

    Choose your answer
      
    Key Concepts
    Projectile Motion

    Question 5

    Marks: 1

    An object is dropped from height and falls through air of uniform density. 

    Which of the following is the correct acceleration-time graph for the object? 

    2-1--sl-mcq-hard-q5-phy

      Choose your answer
        

      Question 6

      Marks: 1

      An object is thrown vertically upwards from the top of a cliff. It then falls directly below into the sea. 

      The graph shows the vertical component of velocity v varies with time t.

      2-1--sl-mcq-hard-q6-phy

      How high is the cliff-top from the surface of the sea? 

      • X

      • Y

      • Y + X

      • Y – X

      Choose your answer
        
      Key Concepts
      Motion Graphs

      Question 7

      Marks: 1

      Baseball player Y throws a ball to baseball player X as shown. 

      2-1--sl-mcq-hard-q7-phy

      What is the direction of the net force on the ball at the instant shown, if air resistance is not neglected? 

        Choose your answer
          

        Question 8

        Marks: 1

        On a clear day, in the absence of air resistance, a cannon ball is fired at an angle θ to the ground with an initial velocity u. Its horizontal range is s. Which of the following statements is incorrect? 

        • The time of flight is fraction numerator s over denominator u space cos space theta end fraction

        • The time of flight is fraction numerator 2 u space sin space theta over denominator g end fraction where g is the acceleration of free fall

        • The shadow of the cannon ball moves with a constant velocity while the ball is in flight

        • The linear momentum of the cannon ball is constant during flight

        Choose your answer
          
        Key Concepts
        Projectile Motion

        Question 9

        Marks: 1

        A body of mass m is projected at an angle φ to the horizontal in a gravitational field. Its trajectory is parabolic and follows the path PQRST. These points are the position of the body along its trajectory at equal time intervals, with T being the object's maximum height. 

        The displacements PQ, QR, RS and ST are:

        • equal

        • decrease at a constant rate

        • increase at a constant rate

        • have equal horizontal components

        Choose your answer
          
        Key Concepts
        Projectile Motion

        Question 10

        Marks: 1

        A small uniform bob is attached to a simple pendulum, and set into motion from some angular displacement. When the bob passes through the lowest point of its motion, the pendulum is cut. If, at this instant, the bob is moving with a speed of v m s–1, at a height h above ground, how far away does the bob land from a position measured directly under the point at which the pendulum is cut? 

        • square root of h over g end root

        • v square root of h over g end root

        • v square root of fraction numerator 2 h over denominator g end fraction end root

        • v square root of fraction numerator h over denominator 2 g end fraction end root

        Choose your answer
          
        Key Concepts
        Projectile Motion