Кинематика (10) Flashcards

1
Q

Скорость по определению

A

v = ∆r/∆t = ∆x/∆t

𐤃r - изменение радиус-вектора, 𐤃x - изменение координаты

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2
Q

Сложение скоростей

A

vНСО = vПСО + vв ПСО

скорость тела относительно неподвижной СО (системы отсчета) равна геометрической сумме скорости тела относительно подвижной СО и скорости подвижной СО относительно неподвижной СО

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3
Q

Скорость при РМД

A

S/t

S - путь, t - время

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4
Q

Координата при РМД

A

x(t) = x0 +vxt

vx - проекция скорости на ось

x0 - начальная координата

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5
Q

Путь при РМД

A

S(t) = vt

S - путь, t - время, v - скорость

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6
Q

Ускорение по определению

A

a = ∆v/∆t = v - v0/∆t

∆v - изменение скорости, v - конечная скорость, v0 - начальная скорость

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7
Q

Скорость при РУД

A

v(t) = v0 + at

v0 - начальная скорость

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8
Q

Путь при РУД

A

S(t) = v0t + at2/2

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9
Q

Координата при РУД

A

x(t) = x00t + at2/2

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10
Q

Путь “без ускорения”

A

S(t) = (v + v0)/2 * t

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11
Q

Путь “без времени”

A

S(t) = (v2 - v20)/2a

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