Answer:
18.72 m
Explanation:
Given initial speed of the vehicle(u) is 100 km/hr.=100*(5/18)m/sec=27.77m/sec
The final speed of the vehicle (v) is 50 km/h.=50*(5/18)m/sec=13.88m/sec
time taken(t)=0.9s
we know that v=u+at
13.88=27.77+a(0.9)
a= - 15.43m/[tex]sec^{2}[/tex]
Also we know that [tex]v^{2} -u^{2} =2as[/tex]
[tex]13.88^{2} -27.77^{2} =2*(-15.43)*(s)[/tex]
[tex]577.96=30.86*s[/tex]
s=18.72m
Therefore the distance travelled is 18.72 m
