\(\Rightarrow a=\dfrac{v-vo}{\Delta t}=\dfrac{15-3}{5}=2,4m/s^2\)

day la chuyen dong thang nhanh dan deu 

<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)

\(\left[{}\begin{matrix}45\left(\dfrac{km}{h}\right)=12,5\left(\dfrac{m}{s}\right)\\20\left(\dfrac{m}{s}\right)=72\left(\dfrac{km}{h}\right)\\6\left(\dfrac{km}{h}\right)=100\left(\dfrac{m}{min}\right)\\\left[{}\begin{matrix}400\left(\dfrac{m}{min}\right)=24\left(\dfrac{km}{h}\right)\\3\left(\dfrac{km}{h}\right)=83,\left(3\right)\left(\dfrac{cm}{s}\right)\\\dfrac{750}{s}=\dfrac{km}{h}?????\end{matrix}\right.\end{matrix}\right.\)

<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

Giải:

12m/s = 43,2 km/h

0,5km/phút = 30 km/h = \(\dfrac{25}{3}\) m/s

12cm/s = 1200 m/s = 4320 km/h

Chúc bạn học tốt!

12 m/s = 43,6 km/h

0,5 km/phút = 30km/h = 8,4 (m/s)

12 cm/s = 0,12 m/s = 0,432 km/h

a)18

b)43,2

c)13.3

muốn đổi về km/h về m/s thì chia cho 3,6

a).18km/h=5m/s

b)12m/s=.43,2km/h

c)48km/h=40/3m/s

d)150cm/s=540m/s=1944km/h

e)62km/h=223,2m/s=803,52cm/s

Quy tắc đổi:

\(1km/h=1km/1h=1000m/3600s=\dfrac{1}{3,6}(m/s)\)

\(\Rightarrow 1m/s=3,6km/h\)

Tương tự với các đơn vị khác.

a, 18km/h=5m/s

b,12m/s=43,2km/h

c,48km/h=\(\dfrac{40}{3}\approx13,33\)m/s

d,150cm/s=1,5m/s=5,4km/h

e,62km/h=\(\dfrac{155}{9}\approx17,22\)m/s=\(\dfrac{15500}{9}\approx1722,22\)cm/s

f,300000km/s=300000000m/s=1080000000km/h

Bạn bấm máy tính casio á ấn \(shift\rightarrow8\rightarrow20\)(20 hoặc 19) nha