Question

if a body is in equilibrium under the effect of some collinear forces,then the minimum number of such forces acting upon the body are ????

Answer 1

Hello friend!!

First of all collinear Forces are parallel to each other and irrespective of their direction

Now if a body in equilibrium then by newton's law of motion it implies there is $\textbf{no External Unbalanced force}$ acting on it


If there is no external unbalanced force then suppose if any force F1 acts in a particular direction then it will have another resultant force F2 of same magnitude in opposite direction and this resultant force can consist of any number of forces but here we are given to consider only collinear forces and also as we are asked to find minimum number of force so we consider the resultant force F2 is produced by only one force.

Thus overall there is only 2 minimum required forces


Hope it helps!! ^_^

Answer 2

Answer:

Three(3)

Explanation:

For equilibrium: Fnet=0

For non-collinear forces, the resultant of two forces can balance the 3rd force i.e., (F1+F2)+F3=0

⇒F3=−(F1+F2)

Hence minimum number of non collinear forces for equilibrium =3.