Предмет: Физика, автор: karmushina2007

На уроке физкультуры ребята лазили по канату. Когда Петя, подойдя к канату, повис на нем, до пола оставалось 70 см. Позже Петя узнал, что его масса равна 60 кг. Чему равен коэффициент жёсткости каната, если изначально расстояние от нижнего конца каната до пола рано 73 см? Ускорение свободного падения равно 10 Н/кг.

Пожалуйста, напишите решение.

Ответы

Автор ответа: AlekstosSim

Дано:

m=60кг

l1=70см

l2=73см

g=10н/кг

Найти:

k-?

Решение:

k=Fупр/∆l

Fупр=m×g

k=(m×g)/(l2-l1)

k=(60кг×10н/кг)/(73см-70см)=600/3=200н/м

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