Acceleration

• What is acceleration defined as?

  Rate of change in velocity
• How is acceleration measured?

  In meters per second squared
• What does the delta sign (Δ) represent?

  Change
• How can change in velocity (Δv) be expressed?

  As v minus u
• If a car accelerates from 15 m/s to 35 m/s in 5 seconds, what is the change in velocity?

  20 m/s
• How do you calculate acceleration from change in velocity?

  Divide change in velocity by time
• What does it mean if acceleration is negative?

  Object is slowing down or decelerating
• What is uniform or constant acceleration?

  Acceleration remains the same over time
• What additional variable is included in the second acceleration equation?

  Distance
• When should you use the second acceleration equation?

  When given the unit of distance
• What is the initial velocity (u) of an object that starts from rest?

  Zero meters per second
• If a ball is dropped and hits the ground at 7 m/s, what is its initial velocity?

  Zero meters per second
• What is the acceleration due to gravity for dropped objects?

  9.8 m/s²
• How do you calculate the height from which a ball is dropped?

  Using the formula \( \frac{v^2 - u^2}{2a} \)
• What is the height from which the ball is dropped if its final velocity is 7 m/s?

  2.5 meters
• What are the key equations for calculating acceleration?

  1. \( a = \frac{\Delta v}{t} \)
  2. \( s = \frac{v^2 - u^2}{2a} \)
• What factors affect the calculation of acceleration?

  • Change in velocity (Δv)
  • Time (t)
  • Distance (s)
  • Initial velocity (u)