0%

DP IB Physics: HL

Topic Questions

Home / IB / Physics: HL / DP / Topic Questions / 2. Mechanics / 2.2 Forces / Multiple Choice


2.2 Forces

Question 1

Marks: 1

A ladder rests on a rough wall and rough horizontal ground. Which diagram correctly labels all forces acting on the ladder? 

2-2-q1-sl-easy-mcq-phy

    Choose your answer
      

    Question 2

    Marks: 1

    A parachutist of mass 75 kg is falling vertically through the air at a constant speed of 0.6 m s–1

    What is the resultant force on the parachutist? 

    • 0 N

    • 75 N

    • 750 N

    • 1000 N

    Choose your answer
      
    Key Concepts
    Newton's Second Law

    Question 3

    Marks: 1

    Which statement best summarises Newton's Third Law of Motion? 

    • If object X exerts a force on object Y, then object Y exerts a greater and opposite force on object X

    • If object X exerts a force on object Y, then object Y exerts a lesser and opposite force on object X

    • If object X exerts a force on object Y, then object Y exerts an equal and opposite force on object X

    • If object X exerts a force on object Y, then object Y exerts no force on object X

    Choose your answer
      
    Key Concepts
    Newton’s Third Law

    Question 4

    Marks: 1

    The image shows a block resting on an inclined plane. 

    2-2-q4-sl-easy-mcq-phy

    Which row in the table gives the correct interpretation of the forces acting on the block, RF and W?

      R F W
    A. weight reaction static friction
    B. dynamic friction weight reaction
    C. reaction dynamic friction weight
    D. reaction static friction weight
      Choose your answer
        

      Question 5

      Marks: 1

      Which statement about Newton's Second Law of Motion is true? 

      • For bodies of constant mass, the resultant force acting on it is inversely proportional to its acceleration

      • For bodies of a non-constant mass, the resultant force acting on it is proportional to its acceleration

      • For bodies of constant mass, the resultant force acting on it is proportional to its acceleration

      • For bodies of a non-constant mass, the resultant force acting on it is inversely proportional to its acceleration

      Choose your answer
        
      Key Concepts
      Newton's Second Law

      Question 6

      Marks: 1

      Which of the following statements about friction is not true?

      • Friction always acts in the opposite direction to the direction of motion 

      • Static friction occurs when two solid objects are in contact and no movement occurs between the two objects

      • For a stationary object, the force due to the coefficient of dynamic friction is at a maximum

      • For a stationary object, the force due to the coefficient of dynamic friction is zero

      Choose your answer
        
      Key Concepts
      Friction

      Question 7

      Marks: 1

      Which statement best summarises Newton's first law of motion?

      • Whenever two objects interact the forces they exert on each other are opposite.

      • A resultant force on an object is equal to the rate of change in momentum.

      • A body will remain at rest or move with constant velocity unless acted on by a resultant force

      • A body will move in a constant velocity only if there is a resultant force acting upon it

      Choose your answer
        
      Key Concepts
      Newton’s First Law

      Question 8

      Marks: 1

      Which statement about drawing free body diagrams is not correct?

      • Arrows must be drawn to scale and represent the size of the force involved

      • All force arrows must touch the object applying the force

      • Force arrows must be drawn as straight lines with a ruler

      • Force arrows don't have to be labelled

      Choose your answer
        
      Key Concepts
      Free-Body Diagrams

      Question 9

      Marks: 1

      Which of the following equations for static friction is correct?

      • ma

      • Ff ≤ μsR

      • Ff  μdR

      • IΔt

      Choose your answer
        
      Key Concepts
      Friction

      Question 10

      Marks: 1

      Which statement is correct about the coefficient of friction, μ?

      • It is always between 0 and 1

      • The coefficient of friction can be different for the same material in different situations

      • The coefficient of dynamic and static friction between the same two surfaces will be different

      • The coefficient of dynamic friction is equal to the frictional force multiplied by the reaction force

      Choose your answer
        
      Key Concepts
      Friction