//Loss in K.E.
uAX=7.79  //m/sec
uBX=-6  //m/sec
vAX=-5.31  //m/sec
vBX=7.104  //m/sec
//mass of the ball m
m=10/9.81
//Loss of K.E.
loss=(10*((7.79^2)+(6*6)-(5.31*5.31)-(7.104*7.104)))/(2*9.81)  //J
printf("\nLoss of K.E.=%.3f J",loss)
//The answer provided in the textbook is wrong