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:An object is acted upon by a system of parallel…The diagram below illustrates three forces acting on…"Sum of all forces acting on a body is zero." This…Uranium of atom number 92 and mass number 238 emits…which of the below conditions must hold for a body…