What statement is NOT TRUE about the free body diagram FDB T

What statement is NOT TRUE about the free body diagram (FDB)?

The FBD has to be free of any support.

The weight has to be on the FBD if it is not zero.

The FBD allows us to determine the net resultant force that causes acceleration.

The forces on a FBD have to be balanced.

Solution

The fourth statement regarding FBD is wrong. The forces on a fbd haven\'t to be balanced. Because fbd represents forces and effects working on the body symbolically in order to simplify the analysis. The statement of balancing of forces is come into act depends on whether the problem is static or dynamic.