A single degree of freedom system is given by, $$m \times \frac{{{d^2}x}}{{d{t^2}}} + c \times \frac{{dx}}{{dt}} + sx = F\cos \omega t$$       with usual notations. It represents

A. μ₁ = μsinβ B. μ₁ = μcosβ C. $${\mu _1} = \frac{\mu }{{\sin \beta }}$$ D. $${\mu _1} = \frac{\mu }{{\cos \beta }}$$

A. Self-closed B. Force-closed C. Friction closed D. None of these

A. Sliding B. Turning C. Rolling D. Screw

A. None of the links is fixed B. One of the links is fixed C. Two of the links are fixed D. None of these