The existence of internal active and internal resisting forces and the new law of physics

Since our new theorywill fundamentally change the thinking in structural engineering, we strongly believe that the following additional comments and information from textbooks will be very useful to the experts in understanding the new law of mechanics. As soon as one accepts the existence of internal active and internal resisting forces, one automatically accepts the new theory on diagonal tension. For that reason, we will use university textbooks to prove the existence of internal active and internal resisting forces in a flexurally bent member.