Final answer:
A force's effect on a body is determined by its magnitude, direction, and point of application, hence the correct response is all of the above factors considered together.
Step-by-step explanation:
How a force affects a body is determined by the size or magnitude of the force, the direction in which the force is applied, and the exact point at which the force is applied—so the correct answer is 4. All of the above. According to Newton's second law, force is a vector quantity, meaning it has both magnitude and direction.
It is the interaction of an object with another object, and its effect is to change the momentum of the body it's acting upon. The momentum can change in terms of velocity or direction, requiring a force to start a body moving, speed it up, slow it down, stop it, or change its direction. In addition to the magnitude and direction, the point of application of the force also greatly influences the body's response, affecting aspects such as torque and angular acceleration.