Q: Which of the following is false regarding the normal force for an object placed on a surface (assume that the system is not accelerating and the only relevant forces are gravitational and normal force)?
A		It is a force always perpendicular to the surface of contact
B		It is a force exerted by the surface onto the object
C		On a ramp with non-zero angle, its value is less than the value of the gravitational force
D		It can exceed the gravitational force of an object (mg)

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