Contact and non contact forces

• What are the two types of forces in sports?

  Contact and non-contact forces
• What defines a vector quantity?

  A vector quantity has magnitude and direction
• Name three examples of vector quantities.

  Force, velocity, and momentum
• What are scalar quantities?

  Quantities with only magnitude
• How are vectors typically represented?

  By an arrow showing magnitude and direction
• How do velocity and speed differ?

  Velocity includes direction, speed does not
• What is a force?

  A push or pull on an object
• What is the difference between contact and non-contact forces?

  Contact forces require touching; non-contact do not
• Give an example of a contact force.

  Friction
• Give an example of a non-contact force.

  Gravitational force
• What is an interaction pair?

  A pair of equal and opposite forces
• How does Newton's Third Law relate to interaction pairs?

  It states forces are equal and opposite
• What force attracts the Sun and the Earth?

  The gravitational force
• What happens when a chair exerts a force on the ground?

  The ground exerts an equal force back
• What are the characteristics of contact and non-contact forces?

  • Contact forces: require touching (e.g., friction, tension)
  • Non-contact forces: do not require touching (e.g., gravitational, magnetic)
• What are the key differences between vector and scalar quantities?

  • Vector quantities: have both magnitude and direction (e.g., force, velocity)
  • Scalar quantities: have only magnitude (e.g., speed, mass)