Calculating g • Review: Freefall • Lab: Calculating g • Wrapping Up… Free Fall: Which Variable Affects Maximum Speed: Height of Drop or Mass of Object? Constant Velocity or Acceleration? • A ball is dropped. • It’s location is marked every second. • Is this falling object accelerating? Notes • Free Fall: A situation where the only force acting on an object and causing it to accelerate is gravity. • Acceleration due to gravity: – On Earth the acceleration due to gravity is 9.81m/s/s Calculating g (gravity) We can calculate g by using the following formula: x = the drop height t = the time until impact 2x g= 2 t 1. Record this data table in your notebook: Drop Height: ______meters 2. Calculate g (show your work) Wrapping Up… • A elephant and a mouse are dropped from the top of the Empire State building at the same time. Which one will hit the ground first? • Why?