Physics
When a running car stops suddenly, the passengers tends to lean forward because of:

Centrifugal force
Inertia of motion
Gravitational force
Inertia of rest

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Physics
In the process of magnetisation of a bar

Only the surface of the bar gets magnetised
Only the ends of the bar get magnetised
The entire bulk of the bar gets magnetised
Only some parts of the outer layers of the bar get magnetised

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