A popular web video shows a jet airplane, a car, and a motorcycle

racing from rest along a runway (Fig. 2-10). Initially the

motorcycle takes the lead, but then the jet takes the lead, and

finally the car blows past the motorcycle. Here let’s focus on

the car and motorcycle and assign some reasonable values to

the motion. The motorcycle first takes the lead because its

(constant) acceleration am = 8.40 m/s2 is greater than the car’s

(constant) acceleration ac = 5.60 m/s2, but it soon loses to the

car because it reaches its greatest speed vm = 58.8 m/s before

the car reaches its greatest speed vc = 106 m/s. How long does

the car take to reach the motorcycle?


이런 문제이다. am은 오토바이의 등가속도이고 ac는 차의 등가속도이다.. 근데 이거 문제 맞는 문제노? 도저히 v0랑 x0(변위)를 0으로 잡고 하기엔 내 상식에 맞지않는다(내 상식이 잘못된거 맞지?)