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//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)
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