Physics
A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to

Outward pull on him
Inertia of motion
Change in acceleration
Change in momentum

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Physics
The Hooke's law is valid for

Entire elastic region of the stress strain curve
Only proportional region of the stress strain curve
Elastic as well as plastic region of the stress strain curve
Entire stress strain curve

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