[填空题]
You have been hired as an expert witne6 ztg )/two;35t atgdybgiy -,uci/3r ss in a court case involving an autohs s1 w 1;f1iz:zz)d-fjzzi(q mobile accident. The accident involved car A of mass 1900 kg which crashed into stationary car B of mass 1100 kg. The driver of car A applied his brakes 15 m before he crashed into car B. After the co:d -(f zf1zzzsiqi hsw;)zj1 1llision, car A slid 18 m while car B slid 30 m. The coefficient of kinetic friction between the locked wheels and the road was measured to be 0.60. Show that the driver of car A was exceeding the 55-mph (90km/h) speed limit before applying the brakes. mi/h
