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Acceleration Acceleration Velocity-time graph Questions

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Acceleration Acceleration tells you how quick the velocity of an object is changing, we calculate it using the formula, π΄= πβπ π A β acceleration ( π/π 2 ) V-final velocity(m/s) U-initial velocity (m/s) T- time taken for change (s)

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Acceleration π΄= πβπ π Means: acceleration= πΆβππππ ππ π£ππππππ‘π¦ ππππ

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**Acceleration When an object speeds up it is accelerating**

When an object slows down it is decelerating When an object has a constant velocity it is not accelerating

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Velocity-time graph 40 30 20 10 Velocity(m/s) Time(s) This graph shows us that the car accelerated for 0-40m/s in 10 seconds It also shows us that the car then stayed at velocity of 40m/s for 20 seconds before slowing from 40-0m/s in 20 seconds

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**Velocity-time graph C B D A**

40 30 20 10 C B Velocity(m/s) D A Time(s) We can calculate the acceleration using the gradient of the graph. The acceleration between point A and B is: π΄= πβπ π π΄= 40β0 10 π΄=4 π/π 2

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**Velocity-time graph C B D A**

40 30 20 10 C B Velocity(m/s) D A We can calculate the distance an object has moved by finding the area under the graph, for example, Between point A and B the area under the graph: 40Γ = 200m

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**Question time What is the formula for acceleration? C B**

2) How far did the object move between point B and C? 3) What was the deceleration between point C and D? 40 30 20 10 C B Velocity(m/s) D A Time(s)

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Acceleration When an object is changing its velocity, we say that the object has acceleration Acceleration is how fast velocity is changing To accelerate,

Acceleration When an object is changing its velocity, we say that the object has acceleration Acceleration is how fast velocity is changing To accelerate,

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