A book leans against a crate on a table. Neither is moving Which of the following statements concerning this situation is/are incorrect.
.

Options

A. The force of the book on the crete is less than that of crete on the book
B. Althrough there is no friction acting on the crate, there must be friction acting on the book or else it will fall
C. The net force acting on the book is zero
D. The direction of the frictional force ating on the book is in the same direction as the frictional acting on the crate.

Answer

a,b,d