Question

Expresa 54km/h a m/s

90km/h a m/

y

-300km/h

Answer 1

$Las \ equivalencias \ son: \\ \\ 1\ km = 1000 \ metros \qquad\qquad 1\ h= 3600\ seg$

$54 \frac{km}{h}\ a\ \frac{m}{seg}= \\ \\ 54 \frac{km}{h}* \frac{1000m}{1km}* \frac{1h}{3600seg} = \\ \\ 54 \frac{\not km}{\not h}* \frac{1000m}{1\not km}* \frac{1\not h}{3600seg} = \\ \\ 54*1000* \frac{1}{3600}\frac{m}{seg}= \boxed{15\frac{m}{seg}} \to \boxed{ \boxed{54\ \frac{km}{h}= \ 15\ \frac{m}{seg}} }$

$90 \frac{km}{h}\ a\ \frac{m}{seg}= \\ \\ 90 \frac{km}{h}* \frac{1000m}{1km}* \frac{1h}{3600seg} = \\ \\ 90 \frac{\not km}{\not h}* \frac{1000m}{1\not km}* \frac{1\not h}{3600seg} = \\ \\ 90*1000* \frac{1}{3600}\frac{m}{seg}= \boxed{25\frac{m}{seg}} \to \boxed{ \boxed{90\ \frac{km}{h}= \ 25\ \frac{m}{seg}} }$

$-300 \frac{km}{h}\ a\ \frac{m}{seg}= \\ \\ -300 \frac{km}{h}* \frac{1000m}{1km}* \frac{1h}{3600seg} = \\ \\ -300 \frac{\not km}{\not h}* \frac{1000m}{1\not km}* \frac{1\not h}{3600seg} = \\ \\ -300*1000* \frac{1}{3600}\frac{m}{seg}= \boxed{ -\frac{750}{3}\frac{m}{seg}} \to \boxed{ \boxed{-300\ \frac{km}{h}= \ -83,\stackrel{\frown}{3} \frac{m}{seg}} }$


Espero que te sirva, salu2!!!!