A massive body is dragged onto the inclined plane, applying a constant force to it, directed parallel to the plane.

A massive body is dragged onto the inclined plane, applying a constant force to it, directed parallel to the plane. What can be the sign of the work of the support reaction force?

The work of the reaction force of the support is zero in the absence of friction; otherwise, this work is negative.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.