When does an object falling vertically through the air reach terminal velocity?

1.2.1 Define speed as distance travelled per unit time; recall and use the equation v = s/t

1.2.11 (old)Recognise linear motion for which the acceleration is constant

1.2.11 Calculate acceleration from the gradient of a speed–time graph

1.2.12 (old)Recognise motion for which the acceleration is not constant

1.2.12 Know that a deceleration is a negative acceleration and use this in calculations

1.2.13 Describe the motion of objects falling in a uniform gravitational field with and without air/liquid resistance (including reference to terminal velocity)

1.2.2 Define velocity as speed in a given direction

1.2.4 Sketch, plot and interpret distance–time and speed–time graphs

1.2.5 （old）Demonstrate understanding that acceleration and deceleration are related to changing speed including qualitative analysis of the gradient of a speed–time graph

1.2.5.1 at rest

1.2.5.2 moving with constant speed

1.2.5.3 accelerating and decelerating

1.2.6 Calculate speed from the gradient of a straight-line section of a distance–time graph

1.2.7 Calculate the area under a speed–time graph to determine the distance travelled for motion with constant speed or constant acceleration

1.2.8 State that the acceleration of free fall g for an object near to the surface of the Earth is approximately constant and is approximately 9.8 m/s^2

1.2.9 Define acceleration as change in velocity per unit time; recall and use the equation a = Δv/Δt