Question

If two equal and opposite forces have the same line of action, then

• A. The resultant force is non-zero, but the resultant moment is zero.
• B. The resultant force is non-zero, as well as the resultant moment is non-zero.
• C. The resultant force is zero, but the resultant moment is non-zero.
• D. The resultant force is zero, as well as resultant moment is zero.

Answer 1

The correct option is D

The resultant force is zero, as well as resultant moment is zero.

As the forces are equal and opposite, they cancel each other out and the resultant force is zero. Also, as they have the same line of action, the resultant moment is also zero.