Question

[Phạm Thành An]

r=20cm

t=0.2s

w=?

v=?

f=?

a_ht=?

Answer 1

[trương khoa]

Đổi :20 cm=0,2 m

\(\omega=\dfrac{2\pi}{T}=\dfrac{2\pi}{0,2}=10\pi\left(\dfrac{rad}{s}\right)\)

\(v=\omega r=10\pi\cdot0,2=2\pi\left(\dfrac{m}{s}\right)\)

\(f=\dfrac{1}{T}=\dfrac{1}{0,2}=5\left(Hz\right)\)