forces

• What are scalars?

  Quantities with only magnitude
• What are vectors?

  Quantities with magnitude and direction
• What is a force?

  A push or pull caused by interaction
• What type of quantities are forces?

  Vector quantities
• What are contact forces?

  Forces occurring when objects touch
• What are non-contact forces?

  Forces that act at a distance
• What happens when an object exerts force on another object?

  It experiences an equal and opposite force
• What are resultant forces?

  Single force replacing multiple forces acting together
• How do you calculate resultant forces acting in the same direction?

  Sum of the magnitudes of the forces
• How do you calculate resultant forces acting in opposite directions?

  Difference between the magnitudes of the forces
• What does it mean if the resultant force on an object is zero?

  The forces are said to be balanced
• How can you find the resultant of two forces not acting along the same line?

  By making a scale drawing
• What is deformation?

  Change in shape caused by forces
• What is elastic deformation?

  Object returns to original shape after forces removed
• What is inelastic deformation?

  Object does not return to original shape
• What causes the force of gravity near Earth?

  The planet's gravitational field strength
• What is weight?

  The force acting on an object due to gravity
• Where can weight be considered to act on an object?

  At the object's center of mass
• How can weight be measured?

  Using a calibrated spring-balance
• How are weight and mass related?

  They are directly proportional to each other
• What happens to weight when mass doubles?

  Weight also doubles
• What are the types of forces and their characteristics?

  • Contact Forces:
  • Occur when objects touch
  • Examples: friction, air resistance, tension, normal force
  • Non-contact Forces:
  • Act at a distance without touching
  • Examples: gravitational, electrostatic, magnetic forces
• What are the types of deformation and their characteristics?

  • Elastic Deformation:
  • Returns to original shape when forces removed
  • Inelastic Deformation:
  • Does not return to original shape when forces removed
• What are the key concepts related to resultant forces?

  • Resultant Forces:
  • Single force replacing multiple forces
  • Calculated by summing or subtracting magnitudes
  • Zero resultant indicates balanced forces