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//Automobile moving
//refer fig. 17.4
//initial velocity
u=19.44  //m/sec
//final velocity 
v=0
//applying impulse momentum equation
//t=1.982/mu
//on concrete road
t1=1.982/0.75  //sec
//on ice
t2=1.982/0.08  //sec
printf("\nOn concrete road t=%.3f sec\nOn ice t=%.3f sec",t1,t2)