Answer to Question #140914 in Physics for Raffy

Question

Why is it not good to step out into the road of which there’s an incoming
truck moving in a fast velocity?

Answer 1

Because it has very high mass and thus inertia. According to Newton's second law, it will take a while until the truck stops, and according to laws of conservation of momentum and energy, your final velocity (if the impact occurs) will be so high that the consequences to your health and body may be mortal.