//Police investigation //refer fig. 16.9 //Let the probable speed of the car just before brakes are applied be u m/sec //F=0.5*W //Final velocity=0 s=60 //m //applying work energy equation u=((sqrt(0.5*60*2*9.81))*60*60)/1000 //m/sec printf("\nThe probable speed of the car just before brakes are applied is %.2f kmph",u)