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 is the acceleration of the car in the example given?

  4 m/s²
• Why can acceleration be negative?

  It implies the object is slowing down
• What does average acceleration refer to?

  Acceleration over a specific time interval
• What is uniform or constant acceleration?

  Acceleration that 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 its final velocity is 7 m/s, what is its initial velocity?

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

  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
• What assumption can be made about the ball's initial velocity when dropped?

  It starts from rest
• What should be ignored when calculating the height of the dropped ball?

  Air resistance
• What does the final velocity of the ball indicate?

  Speed just before hitting the ground
• How does the acceleration of the ball differ from the car's acceleration?

  The ball accelerates at 9.8 m/s² due to gravity