30km/h = 8,3m/s
Công suất
\(P=F.v=200.8,3=1666,\left(6\right)W\)
30km/h = \(\dfrac{25}{3}\)m/s
công suất:
A=F.s
mà \(P=\dfrac{A}{t}\Rightarrow P=\dfrac{F.s}{t}\)
mà \(v=\dfrac{s}{t}\Rightarrow P=F.v\)
\(P=\dfrac{200.25}{3}=\dfrac{5000}{3}\left(W\right)\)