Предмет: Физика, автор: davidpashayan

Брусок лежит на шероховатой наклонной опоре (см. рисунок). На него действуют 3 силы: сила тяжести mg, нормальная составляющая силы реакции опоры N и сила трения Fтp. Если брусок покоится, то модуль равнодействующей сил N и mg равен.

Ответы

Автор ответа: Аноним

Ну очевидно Fтр
потому что в векторном виде
N+m*g+Fтр= 0 ( тело покоится)
N+m*g = - Fтр

но в задаче сказано ПО МОДУЛЮ

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