One of the conditions necessary for an object to be in equilibrium when acted upon by a number of parallel forces is that the vector sum of the forces is? by Sunday | Nov 6 | Physics JAMB | 0 comments A. Average B. Zero C. Negative D. Positive Correct Answer: Option B – Zero Users Also Read These:The diagram below illustrates three forces acting on…What happens when three coplanar non-parallel forces…Which of the following type of motion does a body…A block is acted upon by two horizontal forces as…Uranium of atom number 92 and mass number 238 emits…