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The contact force exerted by a body A on...

The contact force exerted by a body A on another body B is equal to the normal force between the bodies. We conclude that

A

the surface must be frictionless

B

the force of friction between the bodies is zero

C

the magnitude of normal force equals that of friction

D

the bodies may be rough but they don't slip on each other.

Text Solution

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The correct Answer is:
B, D
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