GKE – Investigation 1 Focus Questions 1-1 What is speed? 1-2 What is acceleration? 1-3 What is gravity? Vocabulary acceleration air resistance average speed constant speed distance force gravity position slope speed Concepts • The average speed of an object is the distance it travels in a unit of time(v = ∆x / ∆t). • The slope of the line of a graph of distance versus time represents speed; steeper slopes represent faster speeds. • An object that does not move at a constant speed has acceleration, change in speed per unit per time (a = ∆v / ∆t) • A falling object increases speed with a constant acceleration, regardless of the object’s mass. • Gravity is an attractive force between two objects with a rate of acceleration of 9.8 m/s^2 on Earth.
