Question

Answer 1

Có:

\(\left\{{}\begin{matrix}v=\text{ω}R\\a_{ht}=\text{ω}^2R\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}1,5=\text{ω}R\\22,5=\text{ω}^2R\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}\text{ω}=15rad\text{/ }s\\R=0,1m\end{matrix}\right.\)

Vậy ta chọn đáp án C.

Answer 2

C