Предмет: Физика, автор: andrejprival703

Півтори години хлопчик їхав на велосипеді зі швидкістю 20 км/год потім кілометр йшов півгодини знайди середню швидкість руху хлопчика

Ответы

Автор ответа: samohvalkirill76

Ответ:

Загальний час руху хлопчика дорівнює 1,5 + 0,5 = 2 годинам.

За цей час він пройшов відстань 20 * 1,5 = 30 кілометрів.

Середня швидкість руху хлопчика дорівнює 30 / 2 = 15 кілометрів на годину.

Відповідь: 15 кілометрів на годину.

Розв'язання через формулу середньої швидкості:

Vср = S / T

де:

Vср - середня швидкість, км/год;

S - пройдений шлях, км;

T - час, годин.

Vср = 30 / 2 = 15

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