How to find the acceleration of a body if several forces act on it?

According to Newton’s 2 law: the acceleration of a body a is directly proportional to the resultant of all forces F that act on the body, and inversely proportional to the mass of the body m: a = F / m.
The resultant force F is the vector sum of all forces that act on the body: F = F1 + F2 + F3 + ….. + Fn (vector).
We are looking for the resultant of all the forces that act on the body, and we substitute it into 2 Newton’s law.



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