(a) The resultant force acting on the body = 0
$F-F\text{ }=\text{ }0$
(b) The forces tend to rotate the body between two forces about the midpoint.
Moment of forces = $F\text{ }\times \text{ }r$
$Fr$
(a) The resultant force acting on the body = 0
$F-F\text{ }=\text{ }0$
(b) The forces tend to rotate the body between two forces about the midpoint.
Moment of forces = $F\text{ }\times \text{ }r$
$Fr$