Why do some objects accelerate and others do not accelerate? How do objects that travel in one direction accelerate in the other direction? What is the reason for the increase in the speed of moving objects? These questions and other questions can be answered when we extend the discussion of object motion to another branch of mechanics called dynamics [after the Greek word Dynami means power]. In dynamics, people discuss the causes of exercise and how do they affect exercise? In kinematics research, we only need to know the position of the object in the dynamics at a certain moment, that is, the research leads to the pushing or pulling of the resisting motion.
Our observation is that we need to use force to move the body.
For example, we must play football to move it and push or pull the cart to transport it from one place to another.
Therefore, we can say that force is the force that can produce motion in the body, but sometimes the force may not produce motion in the body.
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For example, if a boy pushes a bus while resting, it will remain still, although the boy's push tends to produce movement within the body. Therefore, it must be said that force is a drug that tends to produce motion in the body. Even this definition is incomplete, because force can also be used to stop the movement of the body.
A common observation is that when we grasp the moving cricket, we apply a force in the opposite direction to the direction of the moving ball, thus stopping the movement of the ball.
Therefore, the full definition of force is that force is an agent who changes or tends to change the state of rest or body movement.
Orignal From: Force and movement
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