When a body is placed on a surface, the body exert a force _______________ equal to its weight on the surface, but the body does not move (or fall) because the surface exerts equal and opposite forces.
A
Upwards
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B
Downwards
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C
Both
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D
None
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Solution
The correct option is C Downwards When a body is placed on a surface, the body exerts a force downwards equal to its weight on its surface, but the body does not none(a fall) because the surface exerts an equal and opposite forces on the body normal to the surface which is called the normal reaction force.