за графіком коливань джерела механічної хвилі (рис. 2) визначте період коливань і частоту хвилі. Якою є довжина хвилі,якщо хвиля поширюється зі швидкістю 20 м/с?
sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letteror each question mark the c
ДАНО
L
H
-------------------------
S - ?
РЕШЕНИЕ
Обозначим S- высота башни
Сразу понятно, что L не равно H .(см на рисунке)
ШАРИК 1
начальная скорость V1o=0
в конце отрезка L имеет скорость V (найдем, нужда для решения)
L=(V^2-V1o^2)/2g=V^2/2g
V=√(2gL) (1)
за остальное время t - шарик 1 пролетел расстояние S-L (с начальной скоростью V)
S- L = Vt +gt^2/2 (2)
ШАРИК 2
начальная скорость V2o=0
S- H высота , с которой началось падение
падение длилось тоже время t
S-H = V2ot +gt^2/2 = gt^2/2 (3)
S-H = gt^2/2
t^2 =2(S-H)/g
t =√(2(S-H)/g ) (4)
подставим (1)(3)и(4) в (2)
S- L = Vt +gt^2/2 = √(2gL) *√(2(S-H)/g ) + (S-H)
S- L- (S-H) = √(2gL) *√(2(S-H)/g)
H-L =√(4L(S-H))
(H-L)^2 =4L(S-H)
S-H=(H-L)^2 /(4L)
S= (H-L)^2 /(4L) + H
ответ высота башни (H-L)^2 /(4L) + H
sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letter a, b, c or d on your answer sheet. Alpaca 26-35read the text and below and choose the correct word for each space. For each question mark the correct letteror each question mark the c