Answer: a=-2.4525 m/s^2
d=s=190.3 m
Explanation:The only force that is stopping the car and causing deceleration is the frictional force Fr
Fr = 25% of weight
W=mg
W=1750*9.81
W=17167.5
Hence
[tex]Fr=\frac{25}{100} * -17167.5\\\\Fr=-4291.875 N[/tex]
Frictional force is negative as it acts in opposite direction
According to newton second law of motion
F=ma
hence
[tex]a=Fr/m[/tex]
[tex]a=-4291.875/1750\\a=-2.4525[/tex]
given
u= 110 km/h
u=110*1000/3600
u=30.55 m/s
to get t we know that final velocity v=0
[tex]v^2=u^2+2as\\0=30.55^2-2*2.4525*s\\s=190.34m[/tex]
