When metro stops at same time we felt a jerk in backward direction but according to inertia we should be feel in farward direction i.e. Acc to me intertia contradict (which not possible)
then why we feel jerk in backward direction?????
the brakes have released, and the negative acceleration has ended, giving a slight positive acceleration and you jerk back.
you are talking about a positive acceleration but i have seen or observe that once wheel stop...wheel stay at their position w.r.t. rail.........when wheel is not moving so there is no possibilities of positive acceleration
just give a reason.
When a metro comes to a sudden stop, you might feel a jerk in the backward direction, which seems to contradict the concept of inertia. However, there is a simple explanation for this.
Inertia refers to the tendency of an object to resist changes in its state of motion. When the metro stops suddenly, your body is already in motion with the metro, and according to inertia, your body would tend to continue moving forward. Therefore, you expect to feel the jerk in the forward direction.
However, what actually happens is that the metro applies brakes to rapidly decelerate. As a result, the metro comes to a stop while your body is still moving forward due to its inertia. This difference in motion between your body and the metro causes you to feel a backward jerk.
To understand this better, imagine you are inside a moving car holding an object. When the car stops suddenly, the object tends to continue moving forward due to inertia. As a result, the object may fall backward relative to the car. The same principle applies to the metro, where the sudden application of brakes causes your body to move backward relative to the forward-moving metro.
So, the perceived backward jerk during a sudden stop in a metro is a result of the difference in motion between your body and the decelerating train, and it is not a contradiction of the concept of inertia.