When a car or bus starts suddenly the passengers fall backward?
When a bus starts suddenly,the person falls backwards because of inertia of rest of passenger. This is due to the fact that because of their inertia ,the passengers tend to remain in their state of rest when the bus starts suddenly.
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EXPLANATION: When a bus suddenly starts moving, the passengers fall backward due to the law of inertia of rest or 1st law of Newton.
When the running bus stops suddenly, the passengers are jerked forward because due to inertia of motion the passengers tend to remain in their state of motion even though the bus has come to rest. Q.
This is due to inertia. When the speeding bus stops suddenly, lower part of the body comes to rest while the upper part of the body tends to maintain uniform motion. Hence, the passenger's are thrown forward.
Trains use their hornsto signal what the train is doing. Weather they are approaching a crossing, or passing through or stopping at a town or station. 1 long horn blast means approaching station.