What do I need to know…?

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Describe how to measure speed

Recall and apply the equation:  speed = distance/time  

Define velocity and acceleration and state their units.  

Know typical values for the speeds of walking, running, cycling and the speed of sound.

Interpret distance-time graphs

Interpret velocity-time graphs

Know that near the Earth’s surface any object falling freely has an acceleration of 9.8m/s2

Describe what is meant by thinking time, thinking distance, braking distance, and stopping distance

Describe the difference between distance and displacement.

Describe the difference between speed and velocity

Calculate acceleration

Apply the equation for uniform acceleration v2 - u2 = 2as

Use the gradient of a distance–time graph to calculate the speed of an object.

Use a velocity time graph to determine acceleration and displacement.

Describe how the resultant force on a falling object changes until terminal velocity is reached

Describe the effect that different factors have on thinking time, thinking distance and braking distance

Explain how the velocity of an object changes when it moves in a circle at a constant speed.

Determine the speed of and accelerating object on a distance-time graph by drawing a tangent.

Calculate the distance travelled from the area under a velocity-time graph.

Use ideas of forces and acceleration to explain how different factors affect thinking time, thinking distance and braking distance

Use an understanding of kinetic energy to explain why braking distances change in the way that they do when speed and mass are changed