IOM 2020, Блиц — Задача 13

The Blitz-contest of IOM-2020

Условие

A block of mass 8 kg is at rest on a plane inclined at 20$^{\circ}$ to the horizontal. The block is connected to a vertical wall at the top of the plane by a string. The string is taut and parallel to a line of greatest slope of the plane. Given that the tension in the string is 13 N, find the frictional force exerted on the block by the plane. $g = 10$ m/s$^2$.

The answer should be given in the SI units unless otherwise stated. If the numerical result turns out to be an integer, it should be given as the answer. Otherwise round the result to the first decimal.

Отговори

Решение

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Оригинал в Архива: iom-2020-blitz-tasks.pdf · официални решения: iom-2020-blitz-answers.pdf