Question

СРОЧНО! Может ли у тормозящего поезда сила реакции опоры (N) = mg ? И ПОЧЕМУ?

Answer 1

-mg, а сила трения равна mMg (m-мю)

Answer 2

Can the reaction force (N) of a braking train be equal to mg? And why?

When a train is braking, the reaction force exerted by the ground on the train can be equal to the weight of the train, which is represented by the product of mass (m) and the acceleration due to gravity (g). This is because the reaction force is equal in magnitude and opposite in direction to the force exerted by the train on the ground, according to Newton's third law of motion.

However, it is important to note that the reaction force can vary depending on the specific circumstances of the braking process. Factors such as the friction between the train's wheels and the tracks, the braking system used, and the speed of the train can all affect the magnitude of the reaction force.

To provide a more accurate answer, it would be helpful to know the specific context or scenario in which you are referring to a braking train.