Forces & their Interactions

• What are the two types of quantities in physics?

  Scalars and vectors

  
• What defines a scalar quantity?

  A scalar has only magnitude
• Give an example of a scalar quantity.

  Mass

  
• What defines a vector quantity?

  A vector has both magnitude and direction
• Give an example of a vector quantity.

  Velocity

  
• Why is it necessary to mention both speed and direction when describing velocity?

  Because velocity is defined by both magnitude and direction
• What is the difference between distance and displacement?

  Distance is a scalar, while displacement is a vector
• How is displacement defined?

  Displacement describes the distance and direction from the starting point to the endpoint
• What is an example of displacement?

  100 km in a Northern direction
• What are some commonly confused pairs of scalar and vector quantities?

  • Distance and displacement
  • Speed and velocity
  • Weight and mass

  
• What is a contact force?

  A contact force acts between objects that are physically touching
• Name an example of a contact force.

  Friction
• What is a non-contact force?

  A non-contact force acts at a distance without any contact between bodies
• Give an example of a non-contact force.

  Gravitational force
• How does gravitational attraction work?

  It is the attractive force experienced by two objects with mass
• What is the role of tension in forces?

  Tension is a force transmitted through a cable or string when pulled
• What is weight in terms of forces?

  Weight is the force of gravity on a mass
• What is the effect of air resistance on a moving object?

  Air resistance opposes the motion of the object
• What is a force pair?

  A force pair occurs when two objects exert forces on each other
• How are forces represented in vector diagrams?

  Forces are represented by arrows
• What is the magnitude of a force measured in?

  Newtons
• How can the direction of a force be described?

  The direction can be described as left, right, up, down, or using angles
• How can angles be used in describing forces?

  Angles can describe the direction of a force with respect to horizontal or vertical
• What is the significance of a free body diagram?

  A free body diagram shows all the forces acting on an object
• What happens when a laptop rests on a desk in terms of force pairs?

  The weight of the laptop exerts a downward force, and the desk exerts an upward normal force
• How does the tension force work in a cable?

  The tension force is opposed by the weight of the object being suspended
• What is the role of friction in motion?

  Friction opposes the motion of objects
• How does air resistance affect a person climbing a hill?

  Air resistance slightly slows the person's motion up the hill
• Why is it important to use correct terminology when discussing forces?

  Using correct terminology ensures clarity and accuracy in communication
• What is the difference between a push and a pull force?

  A push force moves an object away, while a pull force brings it closer
• How can forces be represented on a number line?

  Forces can be represented as positive or negative depending on their direction
• What is the significance of angles in force descriptions?

  Angles help describe the direction of forces that are not perfectly horizontal or vertical
• How do force pairs relate to Newton's third law of motion?

  Force pairs illustrate that for every action, there is an equal and opposite reaction
• What is the role of the normal force?

  The normal force acts perpendicular to the surface supporting an object
• How does the weight of an object relate to its mass?

  Weight is the force of gravity acting on the mass of an object
• What happens to the forces acting on an object at rest?

  The forces acting on an object at rest are balanced
• How does the concept of force apply to everyday situations?

  Forces are involved in all interactions, affecting motion and stability
• What is the importance of understanding forces in physics?

  Understanding forces is crucial for analyzing motion and predicting outcomes
• How can the effects of forces be observed in real life?

  Forces can be observed through changes in speed, direction, and shape of objects
• What is the relationship between mass and weight?

  Weight is the gravitational force acting on a mass