2m/s = .....km/h
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đổi đơn vị
a)7,5km/h= \(\frac{25}{12}\) m/s
b)3 1/2m/p= \(\frac{31}{120}\) m/s
c)0,75km/p= 12,5m/s
d)3,6m/s= 12,96km/h
e)4 1/3km/h= \(\frac{205}{54}\) m/p
f)54km/h= 15m/s
g)18m/s=0,3 m/p
<1m/s=3,6km/h><Bạn cứ xài cái này thì oke>
1,5km/h=\(\dfrac{5}{12}\)(m/s)
20km/h=\(\dfrac{50}{9}\)(m/s)
0,5m/s=1,8(km/h)
1,5m/s=5,4(km/h)
\(2\left(\dfrac{m}{s}\right)=7,2\left(\dfrac{km}{h}\right)\)
\(\left[{}\begin{matrix}t'=s':v'=3,6:7,2=0,5\left(h\right)\\t''=s'':v''=2,1:7=0,3\left(h\right)\end{matrix}\right.\)
\(\Rightarrow v=\dfrac{s'+s''}{t'+t''}=\dfrac{3,6+2,1}{0,5+0,3}=7,125\left(\dfrac{km}{h}\right)\)
\(\left[{}\begin{matrix}45\left(\dfrac{km}{h}\right)=12,5\left(\dfrac{m}{s}\right)\\20\left(\dfrac{m}{s}\right)=72\left(\dfrac{km}{h}\right)\\6\left(\dfrac{km}{h}\right)=100\left(\dfrac{m}{min}\right)\\\left[{}\begin{matrix}400\left(\dfrac{m}{min}\right)=24\left(\dfrac{km}{h}\right)\\3\left(\dfrac{km}{h}\right)=83,\left(3\right)\left(\dfrac{cm}{s}\right)\\\dfrac{750}{s}=\dfrac{km}{h}?????\end{matrix}\right.\end{matrix}\right.\)
<3,6km/h=1m/s>
36km/h=10m/s
108km/h=30m/s
15m/s=54km/h
20m/s=72km/h
12000m/h=\(\dfrac{10}{3}\)m/s
180m/min=3m/s
340m/s=0,34km/s;1500m/s=1/240km/h
340m/s=34/36000km/h;6100m/s=6,1km/s
1500m/s=1,5km/s;6100m/s=61/3600km/h
2) t=2h50'=\(\dfrac{17}{6}h\)
=> Tốc độ của xe là
\(v=\dfrac{S}{t}=\dfrac{120}{\dfrac{17}{6}}=\dfrac{720}{17}\)km/h
=> v=\(\dfrac{720}{17}\)km/h=\(\dfrac{200}{17}\)m/s
2m/s = 7,2 km/h
#Học tốt!!!
7,2 km/h