Q1:As shown in the figure below, based on the actual physical process, the top result spring should be elongated and the bottom result should be shortened. However, the simulation results show that both springs are shortened. Why???
As shown in the figure below, based on the actual physical process, we have F=P_A*S_A-P_B*S_B=16000-10000=6000N.
According Newton's laws, we can deduce the following figure. So the scoep2 and scope 7 will display positive 6000N.
But the simulation result is different from Newton's law. The scope2 is positive 6000N and is right. The scope7 is negative 7000N and is different from positive 6000N. So the simulation disobey Newton's law . Why???