Предмет: Физика, автор: polkanetwork649

задача по физике
Матеріальна точка рухається прямолінійно з початковою
швидкістю υ0 = 10 м/с і сталим прискоренням а = – 5 м/с2

. Визначити, у
скільки разів шлях s, пройдений матеріальною точкою, буде перевищувати
модуль її переміщення r через t = 4 c після початку відліку часу.

Ответы

Автор ответа: leravaleria327
0

Объяснение:

Дано:

V0 = 10м/с

а = -5м/с2

t = 4c

ΔS/Δr = ?

Δr = V0*t+(a*t2)/2 = 10*4+(-5*32)/2 = 7,2м

ΔS = (a*t2)/2 = (-5*32)/2 = -22,5м

ΔS/Δr = -22,5м/7,5м = -4с

Ответ: путь пройденный материальной точкой превышает модуль её перемещения в -4 раза

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