Drag

• What is the effect of friction on a moving object?

  It always slows down and stops the object
• When does friction not slow down an object?

  When in space with no surfaces
• In which direction does friction act relative to movement?

  In the opposite direction to movement
• What must happen for an object to travel at a steady speed?

  The driving force must balance frictional forces
• What causes friction between two surfaces?

  Contact between the surfaces
• What is drag in the context of fluids?

  Resistance experienced in a fluid
• What is air resistance a type of?

  Drag
• What is the most important factor in reducing drag?

  Keeping the shape of the object streamlined
• How do parachutes utilize drag?

  They maximize drag for slowing descent
• How does drag change with speed?

  Drag increases as speed increases
• How does the frictional force change when a car travels at different speeds?

  It increases at higher speeds
• What happens to the engine's workload at higher speeds?

  It has to work much harder
• What is the frictional force at 30 mph compared to 70 mph?

  Less friction at 30 mph
• What are the key points about resistive forces?

  • Friction always opposes motion
  • Air resistance is a type of drag
  • Streamlined shapes reduce drag
  • Drag increases with speed
• What should you be specific about when discussing resistive forces?

  Use the right words for resistive forces
• Why is it important to specify the type of resistive force when discussing motion through air?

  To accurately describe the forces acting