[物理求助]一輛汽車突然停下.......

車裏的乘客並非被拋前,跟據牛頓第1定律,移動中的物體會以原本的速度向同一方向移動,所以當汽車突然停下,乘客的慣性本身向前移動,所以身體才會向前傾,而這並非車車的動能轉移所造成.
在汽車突然停下時,汽車的動能會用來抵銷與地面之間所造成的犘擦功,熱能和聲能.
這是能量守恆定理

這並不是動能轉移,,

而是關於牛頓第一定律(Newton's First Law)的,,

當力施在車子上時,令車子行走,,,

這時乘客與車子也作均速的運動,,

根據牛頓第一定律 :

物體在沒有外來力施加時,其運動的方向,,速度也不變,,

若車子停下,只是沒有外來力施加在車子上,,

但沒有外來力施加在那作均速的運動中的乘客,,

令乘客運動的方向,,速度也不變,,

但他(乘客)會被向前拋

This is NOT a transfer of energy.
When the passengers are sitting in the moving car, they possess their own kinetic energy, which is independent of that of the car. When the car suddenly stopped, the original kinetic energy of the passengers throws them forward.

Just curious that why you think there is an energy transfer (work is done!?) from the car to the passengers or object when a brake has been applied.