tóm tắt
\(r=37\left(cm\right)=0,37\left(m\right)\\ T=0,75\left(s\right)\\ v=?;w=?;a_{ht}=?\)
Giải:
- Vận tốc dài :
ADCT: \(v=\dfrac{2.\pi.r}{T}=\dfrac{2.\pi.0,37}{0,75}\approx3,1\left(\dfrac{m}{s}\right)\)
-Vận tốc góc:
ADCT: \(w=\dfrac{2.\pi}{T}=\dfrac{2.\pi}{0,75}\approx8,4\left(\dfrac{rad}{s}\right)\)
-Gia tốc hướng tâm:
ADCT: \(a_{ht}=r.w^2=0,37.\left(8,4\right)^2\approx26\left(\dfrac{m}{s^2}\right)\)