Question

A body is said to be equilibrium if

• A. It moves vertically
• B. It rotates about its C.G
• C. None of these
• D. It moves horizontally

Answer 1

The correct option is C None of these

• A body said to be in equilibrium if it is at rest or moving with uniform velocity.
• If the linear and angular acceleration of a body are zero, the body is said to be in equilibrium.

OR

• If a body is moving or at rest, but resultant of external force or moment is zero, then body is said to be in equilibrium.

$i.e.,\sum F_X=0;\sum F_Y=0;\sum F_Z=0;\sum M=0$