6. When the speed of a rear-drive car is increasing on a horizontal road the
direction of the frictional force on the tires is: (A) forward for all tires (B)
backward for all tires (C) forward for the front tires and backward for the rear
tires (D) backward for the front tires and forward for the rear tires (E) zero.
寫作批改
VIP與詳解卡管理
私人筆記( 0 )
