3. What other words from the box can you match with the pictures from exercise 1?
Example: It's cold picture b.
It's cold.
It's hot.
It's wet.
It's stormy. It's dry. It's frosty?

Question

Физика: 3. What other words from the box can you match with the pictures from exercise 1? Example: It s cold picture b. It s cold. It s hot. It s wet. It s stormy. It s dry. It s frosty?​

Нєдєля · Accepted Answer

Тяжело в ЗФТШ учиться да ?)))
ну ладно вот решение

Дано:

V1нач.=0
V1конеч.=30 км/ч
V2нач.=40 км/ч
V2конеч.=50 км/ч

Вопрос: ΔK1≤ΔK2 или ΔK1≥ΔK2 (K- кинетическая энергия)

Анализ/Решение :

ΔK=(m(Vконеч.)²)/2 - (m(Vнач.)²)/2 |⇒ m= (2ΔK)/((Vконеч.)² - (Vнач.)²)
т.к. m1=m2 (в обоих случаях автомобиль один и тот же), значит
(2ΔK1)/((V1конеч.)² - (V1нач.)²)=(2ΔK2)/((V2конеч.)² - (V2нач.)²) |:(2)
ΔK1/((V1конеч.)² - (V1нач.)²)=2ΔK2/((V2конеч.)² - (V2нач.)²)
ΔK1/900=ΔK2/900 |⇒ ΔK1=ΔK2
ответ в обоих случаях автомобиль затратит одинаковое кол-во энергии.

3. What other words from the box can you match with the pictures from exercise 1?Example: It's cold picture b.It's cold.It's hot.It's wet.It's stormy. It's dry. It's frosty?​

MOGZ ответил

3. What other words from the box can you match with the pictures from exercise 1?
Example: It's cold picture b.
It's cold.
It's hot.
It's wet.
It's stormy. It's dry. It's frosty?