1. An object of unit mass moving with unit speed applies unit force to any object when the two collide. True or False? How can this definition shown to be equivalent to the definition F=ma of newton. Here its different because we are considering how much a body applies a force not how much force is being applied on the object as is done in classical mechanics. Or the two definitions are exclusive? And similar manipulation for objects accelerating. 2. Is the time of impact during collision dependent on the parameters: mass, velocity of the bodies colliding? 3. Are the answers of this question not subtle and easily deducible from classical mechanics?