Acceleration 

Acceleration in (meters per second) per second, is calculated by finding the slope of a velocity-time graph; constant when the velocity-time graph is a straight line.

v = at ... (left) v = u + at ... (right)

(Meters per second) per second, is written as....

Note: writing m/s/s is conventional, but not strictly correct because m/s/s simplifies to meters. The unit is properly written as (m/s)/s.

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