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
• What is the formula for calculating acceleration?

  Acceleration = Δv / time
• What does a negative acceleration indicate?

  Object is slowing down
• What is average acceleration?

  Acceleration over a specific time period
• What is uniform acceleration?

  Constant acceleration over time
• When should you use the second acceleration equation?

  When distance is given
• What happens to initial velocity (u) if an object starts from stationary?

  It is zero
• If a ball is dropped and hits the ground at 7 m/s, what is its initial velocity?

  0 m/s
• What is the acceleration due to gravity?

  1. 8 m/s²
• How do you calculate the height from which a ball is dropped?

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

  1. 5 meters
• Why can we assume the initial velocity of a dropped ball is zero?

  Because it starts from stationary
• How does the acceleration of the ball change during its fall?

  It remains constant at 9.8 m/s²
• What should you do if you find the car's acceleration varies?

  Consider it average acceleration
• What is the significance of the term "ignoring air resistance" in the example?

  It simplifies the calculation
• What are the key equations for calculating acceleration?

  1. Acceleration = Δv / time
  2. Distance = (v² - u²) / (2a)
• What factors affect the calculation of acceleration?

  • Change in velocity (Δv)
  • Time taken
  • Distance traveled
  • Initial and final velocities