[填空题]
You have been hired as an expert witness in a court fsd9+jn6p iexp:) al+,joc)pkez-.bix2-f z case involving an automobile 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 collision, car A slid 18 m while car B slid 30 m. The coefficient of kinetic friction between the locked wheelck )j pxf-o,z.e i2-zbs 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
