forces

• What is a force classified as in physics?

  A force is a vector.
• Why is it important to know both the size and direction of a force?

  Because a force is a vector, which has both magnitude and direction.
• What are the components of work done in physics?

  • Work is related to force and energy.
  • It involves the application of force over a distance.
• What do free body diagrams illustrate?

  Free body diagrams show all the forces acting on an object.
• What is the significance of distance-time and velocity-time graphs?

  They are used to draw and interpret the motion of objects.
• Who developed the Laws of Motion?

  Isaac Newton.
• What is the importance of reaction times in everyday activities?

  Fast reaction times are necessary to avoid accidents, such as getting hit in the face when playing catch.
• What factors affect total stopping distance in vehicles?

  1. Thinking Distance

  • Distance traveled during reaction time.

  1. Braking Distance

  • Distance taken to stop under braking force.
• What is the formula for calculating stopping distance?

  Stopping Distance = Thinking Distance + Braking Distance.
• If a car is traveling at 30 mph, what are the thinking and braking distances?

  Thinking distance is 9m and braking distance is 9m.
• At 60 mph, what are the thinking and braking distances?

  Thinking distance is 18m and braking distance is 30m.
• What factors affect thinking distance?

  • Speed: Faster speeds increase thinking distance.
  • Reaction Time: Longer reaction times increase thinking distance.
• What factors affect braking distance?

  • Weather: Wet conditions reduce friction and braking force.
  • Road Surface: Poor surfaces (leaves, oil, ice) reduce friction.