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DP IB Physics: HL

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Home / IB / Physics: HL / DP / Topic Questions / 2. Mechanics / 2.4 Momentum & Impulse / Multiple Choice


2.4 Momentum & Impulse

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Question 1

Marks: 1

A force acts on a mass of 5.0 kg and it is initially at rest.

q11_momentum--impulse_ib-sl-physics-mcq 

What is the time taken for the mass to reach an acceleration of 2 m s-2?

  • 2.50 s

  • 2.20 s

  • 2.25 s

  • 2.00 s

Choose your answer
  
Key Concepts
Impulse
Force & Momentum

Question 2

Marks: 1

A body of mass 3M at rest explodes into two pieces of mass 2M and M. 

What is the ratio fraction numerator k i n e t i c italic space e n e r g y italic space o f italic space italic 2 M over denominator k i n e t i c italic space e n e r g y italic space o f italic space M end fraction and fraction numerator italic m italic o italic m italic e italic n italic t italic u italic m italic space italic o italic f italic space italic 2 italic M over denominator italic m italic o italic m italic e italic n italic t italic u italic m italic space italic o italic f italic space italic M end fraction?

 

 

 fraction numerator bold italic k bold italic i bold italic n bold italic e bold italic t bold italic i bold italic c bold italic space bold italic e bold italic n bold italic e bold italic r bold italic g bold italic y bold italic space bold italic o bold italic f bold italic space bold italic 2 bold italic M over denominator bold italic k bold italic i bold italic n bold italic e bold italic t bold italic i bold italic c bold italic space bold italic e bold italic n bold italic e bold italic r bold italic g bold italic y bold italic space bold italic o bold italic f bold italic space bold italic M end fraction fraction numerator bold italic m bold italic o bold italic m bold italic e bold italic n bold italic t bold italic u bold italic m bold space bold italic o bold italic f bold space bold 2 bold italic M over denominator bold italic m bold italic o bold italic m bold italic e bold italic n bold italic t bold italic u bold italic m bold space bold italic o bold italic f bold space bold italic M end fraction

A.

 1 half

-1

B.

 1

-1

C.

 1 fourth

2

D.

 1 half

-2
    Choose your answer
      
    Key Concepts
    Conservation of Linear Momentum
    Collisions & Explosions

    Question 3

    Marks: 1

    Which of the following is an elastic collision?

    • A ball dropped from a height and bouncing up to a lower height

    • Two railway trucks colliding and they link together

    • Two gas molecules collide and a bond is formed between them

    • Two gas molecules collide and then travel perpendicular to each other

    Choose your answer
      
    Key Concepts
    Collisions & Explosions

    Question 4

    Marks: 1

    A ball of mass m travels horizontally and strikes a vertical wall with a speed of vi ms-1. It then rebounds horizontally at speed  vf ms-1. The ball is in contact with the wall for time Δt.q14_momentum--impulse_ib-sl-physics-mcq

    What is  if the ball rebounds after an impulse of magnitude I?

    A.

     vfinal = fraction numerator italic 1 italic plus italic v subscript italic i italic n italic i italic t italic i italic a italic l end subscript over denominator italic m end fraction

    B.

     vfinal = fraction numerator italic 1 italic plus m v subscript i n i t i a l end subscript over denominator m end fraction

    C.

     vfinal = fraction numerator italic 1 italic minus sign italic m italic v subscript italic i italic n italic i italic t italic i italic a italic l end subscript over denominator italic m end fraction

    D.

     vfinal = fraction numerator italic 1 italic minus v subscript i n i t i a l end subscript over denominator m end fraction
      Choose your answer
        
      Key Concepts
      Impulse

      Question 5

      Marks: 1

      A stone of mass 0.5 kg is thrown with an initial speed of 10 m s-1 at an angle θ to the vertical. P is the highest point of the motion and air resistance is negligible.

      q15_momentum--impulse_ib-sl-physics-mcq

      What is the momentum of the stone at P?

      • 5 sin θ

      • 5

      • 5 cos θ

      • 0

      Choose your answer
        
      Key Concepts
      Conservation of Linear Momentum

      Question 6

      Marks: 1

      A truck T moving horizontally collides with an identical truck S that is at rest.q16_1_momentum--impulse_ib-sl-physics-mcq

       T strikes S with speed 2v.

      What is a possible outcome of the collision?q16_2_momentum--impulse_ib-sl-physics-mcq

       

        Choose your answer
          
        Key Concepts
        Conservation of Linear Momentum
        Applying Conservation of Momentum

        Question 7

        Marks: 1

        A ball of mass m strikes a vertical wall with a speed v at an angle of θ to the wall. The ball rebounds at the same speed and angle in time t. What is the magnitude of the impulse on the wall?

        q17_momentum--impulse_ib-sl-physics-mcq

        • zero

        • 2mv

        • 2mv sin θ

        • 2mv cos θ

        Choose your answer
          
        Key Concepts
        Impulse

        Question 8

        Marks: 1

        A ball of mass 4.0 kg, initially at rest, is acted on by a force F which varies with t.

        q18_momentum--impulse_ib-sl-physics-mcq

        What is the velocity of the ball after 14 s?

        • 7 m s-1

        • 56 m s-1

        • 14 m s-1

        • 28 m s-1

        Choose your answer
          
        Key Concepts
        Impulse
        Force & Momentum

        Question 9

        Marks: 1

        Which of the following is true for momentum and impulse?

        • Momentum is conserved in an inelastic collision

        • Impulse is the momentum 

        • The direction in which an object is travelling in doesn’t affect its impulse

        • A heavier object always experiences a greater impulse than a lighter one

        Choose your answer
          
        Key Concepts
        Impulse
        Conservation of Linear Momentum

        Question 10

        Marks: 1

        Two balls m and 2m collide elastically with speeds v and 2v respectively. After the collision, they both move in opposite directions.q20_momentum--impulse_ib-sl-physics-mcq

        What speed does the 2m ball move with after the collision?

        A.

         square root of 5 over 2 end rootv

        B.

        5 over 2v

        C.

         square root of 1 half end rootv

        D.

        1 halfv
          Choose your answer
            
          Key Concepts
          Conservation of Linear Momentum
          Applying Conservation of Momentum


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