QUESTION 2 (Start on a new pago.) A billboard, mass 15 kg. is suspended from a roof by means of a light inextensible
string. Force F pulls the billboard sideways, as shown in the diagram below.
40°
string
15 kg
When the angle between the roof and the string is 40', a closed vector diagram is
obtained for all the forcos acting on the billboard.
2.1
What deduction can be made when the forces acting on an object forms a
closed vector diagram?​

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.