The document discusses free fall and concepts related to an object falling due to gravity, including: - An object in free fall experiences constant acceleration of 10 m/s2 due to gravity. - The speed of a falling object increases linearly with time according to the equation speed = acceleration x time. - Examples calculate the speed of an apple after 4.5 seconds, 8 seconds, and 15 seconds of falling to be 45 m/s, 80 m/s, and 150 m/s respectively. - Distance fallen increases with the square of the time according to the equation distance = 1/2 x acceleration x time2.