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Question

Why are the passengers in the upper deck of a double-decker bus not allowed to stand?

A
This ensures that the centre of gravity of the system may not rise up and the bus may not be toppled due to unstable equilibrium
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B
This ensures smaller centripetal force, thus helping the driver to negotiate the roundabouts properly
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C
If the passengers are in standing position, they may start oscillating due to jerks and there is a possibility of resonance, causing the bus to be toppled
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D
This is just for the safety reason
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Solution

The correct option is A This ensures that the centre of gravity of the system may not rise up and the bus may not be toppled due to unstable equilibrium
When the passengers stand, the center of gravity rises. If it rises much it becomes unstable and may topple down.

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