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DP IB Physics: HL

Topic Questions

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

What is the equation for momentum?

  • p space equals space F s

  • p space equals space m v

  • p space equals space 1 half m v squared

  • p space equals space F capital delta t

Choose your answer
  
Key Concepts
Force & Momentum

Question 2

Marks: 1

A tennis ball is thrown at a wall and then bounces off. 

2-4-q2-sl-easy-mcq-phy-png

Which row states the correct directions for the velocity, v, before and after hitting the wall?

 

Before collision

After collision
A. − −
B. − +
C. + −
D. + +
    Choose your answer
      
    Key Concepts
    Force & Momentum

    Question 3

    Marks: 1

    A car drives into a wall. The change in momentum is 17 000 kg ms−1 and the time of impact is 0.1 seconds. 

    What is the force acting on the car as a result of the collision?

    • 17 000 N

    • 1 700 000 N

    • 170 000 N

    • 1700 N

    Choose your answer
      
    Key Concepts
    Force & Momentum

    Question 4

    Marks: 1

    Which of the following is the correct equation for impulse?

    • I space equals space m v space – space m u

    • I space equals space F capital delta p space

    • I space equals space capital delta t space

    • I space equals space fraction numerator F over denominator increment t end fraction

    Choose your answer
      
    Key Concepts
    Impulse

    Question 5

    Marks: 1

    Which feature on a force-time graph represents the impulse?

    • Gradient

    • y-intercept

    • Area 

    • x-intercept

    Choose your answer
      
    Key Concepts
    Impulse

    Question 6

    Marks: 1

    Before a collision object A is stationary and object B is travelling at 1 ms−1 . 

    What is the correct symbol and value for the initial velocity of object A?

    • uB  = 0

    • uA = 0

    • vA = 0

    • uA = 1

    Choose your answer
      
    Key Concepts
    Conservation of Linear Momentum

    Question 7

    Marks: 1

    What is the definition of an external force?

    • Forces that act on a system from outside of it

    • Forces exchanged by the particles in a system

    • Every action has an equal and opposite reaction

    • The rate of change of momentum on a body

    Choose your answer
      
    Key Concepts
    Conservation of Linear Momentum

    Question 8

    Marks: 1

    What is the definition of an inelastic collision?

    • A collision where kinetic energy is conserved

    • A collision where the momentum is conserved

    • A collision where both objects are stationary after the collision

    • A collision where kinetic energy is not conserved

    Choose your answer
      
    Key Concepts
    Collisions & Explosions

    Question 9

    Marks: 1

    What is the main purpose of the crumple zone in a car?

    • To decrease the contact time over which a collision occurs.

    • To increase the contact time over which a collision occurs.

    • To reduce the mass of the car involved in the collision.

    • To reduce damage to the rest of the car in a collision.

    Choose your answer
      
    Key Concepts
    Applying Conservation of Momentum

    Question 10

    Marks: 1

    What type of collision are explosions?

    • Elastic

    • Conserved

    • Inelastic

    • Impulsive 

    Choose your answer
      
    Key Concepts
    Collisions & Explosions


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