Define speed as distance travelled per unit time; recall/use: v = s/t
1.2.2—Velocity as speed in a given direction
Define velocity as speed in a given direction
1.2.3—Recall/use: average speed = total
Recall/use: average speed = total distance travelled / total time taken
1.2.4—Distance–time and speed–time graphs
Sketch, plot and interpret distance–time and speed–time graphs
1.2.5—From given data or the shape of a
Determine qualitatively from given data or the shape of a distance–time graph or speed–time graph when an object is: (a) at rest (b) moving with constant speed (c) accelerating (d) decelerating
1.2.6—Speed from the gradient of a
Calculate speed from the gradient of a straight-line section of a distance–time graph
1.2.7—Area under a speed–time graph to
Calculate the area under a speed–time graph to determine the distance travelled for motion with constant speed or constant acceleration
1.2.8—Acceleration of free fall g for an
State: the acceleration of free fall g for an object near to the surface of the Earth is approximately constant, about 9.8 m/s²
1.2.9—Acceleration as change in velocity per
Define acceleration as change in velocity per unit time; recall/use: a = Δv/Δt
1.2.10—From given data or the shape of a
Determine from given data or the shape of a speed–time graph when an object is moving with: (a) constant acceleration (b) changing acceleration
1.2.11—Acceleration from the gradient of a
Calculate acceleration from the gradient of a speed–time graph
1.2.12—A deceleration is a negative
Know: a deceleration is a negative acceleration and use this in calculations
1.2.13—Motion of objects falling in a uniform
Describe the motion of objects falling in a uniform gravitational field with and without air/liquid resistance, including reference to terminal velocity