За 2 секунды прямолинейного равноускоренного движения тело прошло 20 метров,причем его скорость увеличилась в 3 раза. определите ускорение тела.

neznau po4emu nemogu na russkom pisat`. ieroglifi kakieto. vobshem zada4a

u - na4alnaya skorost`

u(2) = 3u - kone4naya skorost`

3u = u + (at)/2

2u = a

u = a/2

s=u*t + (a*t*t)/2

s = (a*t)/2 + (a*t*t)/2

20 = a + 2a

3a = 20

a = 20/3 

a= 6 celih i 1/3

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