Question

A wooden rod is pivoted horizontally at the point $P$ on the wall. The rod is free to move about pivoted point $P$. A vertically upward force of $10N$ is applied at point $A$, and then after some time, the force is transferred to $B$. Then which of the following statements are correct?

• A. When force is applied at $B$, the rod will move in counterclockwise.
• B. When force is applied at $B$, the rod will move in clockwise.
• C. When force is applied at $A$, the rod will move in clockwise.
• D. When force is applied at $A$, the rod will move in counterclockwise.

Answer 1

Answer: (A), (C)

When force is applied at $A$, the rod will move in clockwise.

Case 1: When vertically upward force is applied at $A$.
The rod will move in the clockwise direction.

Case 2: When vertically upward force is applied at $B$.
The rod will move in the counterclockwise.