acceleration

• What is acceleration?


  Acceleration is the rate at which an object's velocity changes over time.
• Why is acceleration considered a vector quantity?


  Because it has both magnitude and direction.
• What is the formula for acceleration?


  Acceleration is given by $a =$$\frac{\Delta v}{t}$.
• What does the formula $4y^2 - u^2 =$$2as$ represent?


  It relates initial and final velocities, acceleration, and distance.
• In what units is acceleration measured?


  Acceleration is measured in meters per second squared (m/s²).
• What is positive acceleration?


  Positive acceleration occurs when an object is speeding up.
• What is negative acceleration?


  Negative acceleration, or deceleration, occurs when an object is slowing down.
• What happens to acceleration if velocity is constant?


  If velocity is constant, acceleration is zero.
• What does the slope of a velocity-time graph represent?


  The slope of a velocity-time graph represents acceleration.
• What does a straight line with a positive slope on a velocity-time graph indicate?


  A straight line with a positive slope indicates constant positive acceleration.
• What does a straight line with a negative slope on a velocity-time graph indicate?


  A straight line with a negative slope indicates constant negative acceleration.
• What does a flat line (zero slope) on a velocity-time graph indicate?


  A flat line indicates zero acceleration (constant velocity).
• What are typical walking, running, and cycling speeds?

  • Walking: 1.5 m/s
  • Running: 3.0 m/s
  • Cycling: 3.0 m/s