Предмет: Физика, автор: andreykatikhon1

Очень прошу сделай 5 и 7 задания, скоро кр по физике

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Автор ответа: Любовьфизики12

6.
P=A/t
A=mgh A=10*200*3=6000Дж
P=6000/5=1200Вт
7.
m1V1+m2V2=m1V1'+m2V2'
m1V1+m2V2=(m1+m2)V3'
V3'=(m1V1+m2V2)/m1+m2
V3'=(50*1,5+150*0,5)/200=0,75м/с
V1-скорость школьника
V2-скорость тележки
V3-скорость тележки со школьником

Автор ответа: andreykatikhon1

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