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Which of the following best defines force?

  1. An object's resistance to motion

  2. A push or pull exerted on an object

  3. The speed of an object's movement

  4. The balance of an object's net movement

The correct answer is: A push or pull exerted on an object

The correct answer is indeed a push or pull exerted on an object. This definition aligns with the fundamental concepts of physics, where force describes the interaction that can change the motion of an object. Forces can cause objects to accelerate, decelerate, change direction, or deform. Other options present concepts related to motion or physical properties but do not accurately define force. An object's resistance to motion refers to inertia rather than force itself. The speed of an object's movement pertains to its velocity, which does not encompass the idea of a force acting on it. Lastly, the balance of an object's net movement relates to equilibrium and does not encapsulate the dynamics of force, which is inherently about the interaction or influence exerted on an object causing a change in its state of motion.