Motion

What the syllabus asks of you

• Define speed as distance travelled per unit time; recall and use the equation v = s t
• Define velocity as speed in a given direction
• Recall and use the equation 9 Define acceleration as change in velocity per
• average speed = total distance travelled / total time taken Sketch, plot and interpret distance–time and unit time; recall and use the equation a = ∆v / ∆t speed–time graphs
• Determine, qualitatively, from given data or the 10 Determine from given data or the shape of a shape of a distance–time graph or speed–time speed–time graph when an object is moving graph when an object is: with: (a) at rest (a) constant acceleration (b) moving with constant speed (b) changing acceleration (c) accelerating (d) decelerating
• Calculate speed from the gradient of a straight- 11 Calculate acceleration from the gradient of a line section of a distance–time graph speed–time graph
• Calculate the area under a speed–time graph to determine the distance travelled for motion with constant speed or constant acceleration 12 Know that a deceleration is a negative acceleration and use this in calculations
• State that the acceleration of free fall g for 13 Describe the motion of objects falling in a an object near to the surface of the Earth is uniform gravitational field with and without air/ approximately constant and is approximately liquid resistance, including reference to terminal 9.8 m / s2 velocity