Предмет: Физика, автор: liraudzumaki

на яку висоту під стрибне людина , масою 52 кг на батуті жорсткістю 6 кн/м , якщо на початку стрибка батут розтягнувся на 50 см​

Ответы

Автор ответа: zinovicgrigorij
0

Ответ: 0,94м

Объяснение:

Дано:

m=52кг

х=50см=0,5м

k=6кН/м=6000Н/м

-----------------------

h-?

Потенциальная энергия спортсмена, подпрыгнувшего на высоту h равна:

Eп1=m*g*(h+x)

Потенциальная энергия батута в момент прыжка спортсмена равна:

Еп2=kx²/2

Учитывая что потенциальная энергия батату перейдет в потенциальную энергию спортсмера, приравняем эти два уравнения:

Еп1=Еп2

m*g*(h+x)=kx²/2

Отсюда

h=(kx²/2-mgx)/(mg)=(6000*0,5²/2-52*10*0,5)/(52*10)=0,94м

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