In: Physics
4. Indicate whether the following propositions are true or false and argue the reasons: a. A body on which various forces act, the resultant of which is different from zero, remains at rest. b. A body that has no acceleration is not subjected to any force. c. If the speed of a body is zero at a given instant, it is because the resultant of all the forces acting on it is zero at that instant. d. The speed of a body is only determined by the force acting on it. and. The displacement of a body is only determined by the force acting on it.