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Q: . . . . . . . is the interaction between two objects.
  • A. inertia
  • B. momentum
  • C. pressure
  • D. force
Correct Answer: Option D - Whenever there is an interaction between two object, there is a force upon each of the objects. Force is a vector quantity. The SI unit of force is Newton.
D. Whenever there is an interaction between two object, there is a force upon each of the objects. Force is a vector quantity. The SI unit of force is Newton.

Explanations:

Whenever there is an interaction between two object, there is a force upon each of the objects. Force is a vector quantity. The SI unit of force is Newton.