its a replication of the first case with an imaginary spring. You can look at the first case and see that Kc does not act until contact occurs. After that "if" we treat the fixed surface to be rigid then it introduces an infinite stiffness into the system.
Hi mam,
You said you had discussed about Lagrange multiplier method before.
Is that video available in your channel?
How is kc = 0 for D
its a replication of the first case with an imaginary spring. You can look at the first case and see that Kc does not act until contact occurs. After that "if" we treat the fixed surface to be rigid then it introduces an infinite stiffness into the system.