The speed-time graph below shows the journey of a train between stations.
Find
a) the acceleration of the train at the start of the journey?
b) the deceleration of the train at the end of the journey?
c) the total distance travelled by the train in kilometers?
Round your answers to 1 decimal place where necessary.
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is the length of a diagonal across a square with sides of one unit of length; this follows the Pythagorean theorem. It was probably the first number known to be irrational.[citation needed]
As a good rational approximation for the square root of two, with a reasonably small denominator, the fraction 99/70 (≈ 1.4142857) is sometimes used.
The sequence A002193 in the OEIS consists of the digits in the decimal expansion of the square root of 2, here truncated to 65 decimal places:
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