If a running bus stops suddenly, the passengers standing inside it falls forward, explain why?

When train suddenly stops, the passengers fall forward. It is due to

When a horse suddenly gallops, the rider falls backward. Why ?

A copper coil L wound on a soft iron core and a 15 W - 110 V lamp are connected to a 30 V battery through a tapping key as shown in the figure. When the key is closed, the lamp glows dimly. But when the key is suddenly opend, the lamp flashes for an instant to much greater brightness. Explain, why.

Components of a binary mixture of two liquids A and B were being separated by distillation. After some time separation of components stopped and composition of vapour phase becomes same as that of liquid phase. Both the components started coming in the distillate. explain why this happened.

A person driving a car suddenlyapplies the brakes on seeing a child on the road ahead. if he is not wering seat belt, he falls forward and hits his head against the steering wheel. Why?

Why does the horse rider fall forward when a running horse suddenly stops ?