P9 Motion Revision - created from Mind Map

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9.1 speed and distance time graphs

9.2 Velocity and Acceleration

9.3 More about velocity time graphs

9.4 Annalysing motion time graphs

Speed=Distance/Time

Distance time graph

v=s/t

m/s=m/s

A straight verticle line symbolises that the object is at stop

The speed of the object can be calculed by working out the gradient

Velocity is the speed in a given direction

A vector is a physical quantity with direction and magnitude

Acceleration=change in velocity/time taken

Deceleration is the change in velocity per second when an object slows down

velocity time graphs can be used to calculate acceleration

a=delta v/t

m/s^2=m/s /s

Motion sensors

The gradient of a line on a velocity time graph represents the acceleration

The area under the line on a velocity time graph represents the distance travelled

Motion sensors send sound waves to a moving object to measure its change in speed

The motion sensor is linked to a computer and records the velocity change

If the line is horizontal the acceleration is 0

The speed of an object moving at a constant speed is given by the gradient of the line on a distance time graph

The accseleration of an object is given by the gradient of a line on a velosity time graph