10. For a body to be equilibrium under the combined action of several forces, pi
ID: 778571 • Letter: 1
Question
10. For a body to be equilibrium under the combined action of several forces, pick the best answer: all the forces must be applied at the same point B) A) all of the forces acting on the body are composed of pairs of equal and opposite forces C) any two of these forces must be balanced by a third force D) the sum of all torques about any axis of rotation and the sum of all forces must equal zero E) there must be equal numbers of positive and negative torques 11. A picture is to be hung from the ceiling by means of two wires. Order the following arrangements of the wires according to the tension in wire B, from LEAST to greatest (note that "cm" is the center of mass of the picture and it lies at the geometric center) B A ecm Cm B) 111, 11,1 C) I and II tie, then I11 E) all tie When an object is in equilibrium, the sum of all torques acting on it is zero. This statement requires that all torques must be calculated using a rotation axis that is at: A) the center of mass B) the origin of the coordinate system C) the geometrical center D) the point of application of one of the forces E) at any single point 12.Explanation / Answer
Problem-10
According to Newton's first law of motion:- "If the vector sum of all the forces acting on a particle is zero then and only then the particle remains unaccelerated i.e. remains at rest or moves with constant velocity."
Hence,
The for the given problem - sum of all torques about any axis of rotation and the sum of all forces must equal to zero.
Thus option-D is correct answer.
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