Предмет: Физика, автор: anastasijaeremina202

Мотоцикліст проїхав 90 км зі швидкістю 70 км/год, а потім ще 30 хвилин - зі швидкістю 50 км/ год. Побудуйте графіки залежності шляху та швидкості від часу. Визначте середню швидкість руху.
Ребятки срочно прошу..

Ответы

Автор ответа: yuliakl2018

Ответ:

Дано:

L1=90км

V1=70км/год

V2=50км/год

t2=30хв=0.5год

_______________

L2-? t1-?

Vc=L1+L2/t1+t2=90+25/0.5+1.3=115/1.8≈64 км/год.

t1=L1/V1=90/70≈1,3год.

L2=V2×t2=50×0.5=25км

Відповідь: середня швидкість - 64 км/год.

anastasijaeremina202: Спасибо большое!!!

yuliakl2018: прошу;)

anastasijaeremina202: а откуда 1,8 взялась?

anastasijaeremina202: и 115

yuliakl2018: ми просто додали

anastasijaeremina202: а как получить 1,8?

yuliakl2018: ми 1.3 додали з 0.5

anastasijaeremina202: а 115?

yuliakl2018: 90+25

anastasijaeremina202: спасибки

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