和动能和功有关的一道物理题虽然是英文的,但是题不是很难,答案要理由.Youslamonthebrakesofyourcarinapanic,andskidacertaindistanceonastraight,levelroad.Ifyouhadbeentravelingtwiceasfast,whatdistancew

Question

和动能和功有关的一道物理题
虽然是英文的,但是题不是很难,答案要理由.
You slam on the brakes of your car in a panic,and skid a certain distance on a straight,level road.If you had been traveling twice as fast,what distance would the car have skidded,under the same conditions?
A.It would have skidded 4 times farther.
B.It would have skidded twice as far.
C.It would have skidded 1.4 times farther.
D.It is impossible to tell from the information given.
正确的是D,但我不知道为什么

Answer 1

要不然是什么?
这和初速度、动摩擦因数有关,题目里都没有给出啊