Adittion of forces on the same direction

 

Statement

difficulty

Two friends, a stocky one and a slim one, push a coach on the same direction. The first one exert a force of 11 N and the second one a force of 7 N. What is the resultant force?

Solution

Info

F1 = 11 N
F2 = 7 N
FR = ?

Resolution

Thus the forces exerted are concurrent and are applied on the same direction, both can be replaced by a single resultant force whose effect is the same if we would apply the previous ones. The magnitude of the new resultant force is calculated: 

FR = F1 + F2
FR = 11 N + 7 N
FR = 18 N

Formulas worksheet

These are the main formulas that you must know to solve this exercise. If you are not clear about their meaning, we recommend you to check the theory in the corresponding sections. Furthermore, you will find in them, under the Formulas tab, the codes that will allow you to integrate these equations in external programs like Word or Mathematica.

Formulas
Related sections
∑F→=F1→+F2→+F3→+...+Fn→
Resultant Force of a System of Forces

Back to...

Subject Newton's laws of motion
Section Resultant Force of a System of Forces