The body falls along the vertical wall. Will its motion be influenced by the sliding friction force?

The sliding friction force Ffr is determined by the formula Ffr = µ · N, where µ is the sliding friction coefficient and depends only on the quality of the contacting surfaces, and N is the support reaction force, which arises as an elastic force in response to the force pressing to the support. In this situation, with a free fall of a body along a vertical wall, there is no force that presses the body to the wall, which means that N = 0 N, and then Ffr = 0 N. Answer: with a free fall of a body along a vertical wall, the sliding friction force will not affect it traffic.