[tex]\bf v=50\dfrac{km}{h} =50 \cdot \dfrac{1000m}{3600s} =\dfrac{50000m}{3600s} \cong 13,9 \dfrac{m}{s}[/tex]
[tex]\bf \Delta t = 5\,s[/tex]
[tex]\bf v=\dfrac{\Delta d}{\Delta t} \implies \Delta d =v \cdot \Delta t[/tex]
[tex]\bf \implies \Delta d = 13,9\dfrac{m}{s} \cdot 5 s= \boxed{\boxed{\bf 69,5 \, m}}[/tex]
[tex]\bf a=\dfrac{\Delta v}{\Delta t} =\dfrac{13,9\dfrac{m}{s} }{5\, s} =\dfrac{13,9}{5} \dfrac{m}{s^2} =2,78\dfrac{m}{s^2}[/tex]
[tex]\bf \implies \boxed{\boxed{\bf a=2,78\dfrac{m}{s^2} }}[/tex]
Bafta! :)
#copaceibrainly
