There are no free body diagram used in the calculations of the forces at the supports and at the joints. Because the free body diagrams of a machines are so hard to be made.

• A. The first part of the statement is false and other part is true
• B. The first part of the statement is false and other part is false too
• C. The first part of the statement is true and other part is false
• D. The first part of the statement is true and other part is true too