Question

Which figure represents the correct $F.B.D.$ of a rod of mass $m$ as shown in the figure:

• A.
• B. .
• C.
• D. None of these

Answer 1

Answer: (C)

Force exerted by string is always along the string and of pull type. When there is a contact between a point and a surface the normal reaction is perpendicular to the surface and of push type. Gravity or weight always acts vertically downward.