Kulka, staczająca się w pochyłej rynnie, porusza się ruchem jednostajnie przyspieszonym. W pierwszej.... Question from @pawelkingainka

September 2018 1 23 Report

Kulka, staczająca się w pochyłej rynnie, porusza się ruchem jednostajnie przyspieszonym. W pierwszej sekundzie szybkość kulki wzrosła o 0,3 m/s. Podaj przyrost szybkości kulki w trzeciej sekundzie ruchu.

zuzik87 Przyspieszenie a = Δv/t
jest ono liczbowo równe zmianie prędkości w ciągu 1s.
W ruchu jednostajnie przyspieszonym jest ono stałe i w ruchu w każdej sekundzie wzrasta o 0,3m/s.

Δv = 0,3m/s w I, II, III.sekundzie ruchu, ale:
v = 0,3m/s, 0,6m/s, 0,9m/s po kolejnych sekundach ruchu.

czyli 3s= 0.9m/s

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