Is force the cause of changing the state of motion of an object

It is correct that force can change the velocity of an object and can also change the direction of motion of the object. In science, the change in the velocity of an object and the change in the direction of motion are collectively referred to as the change in the state of motion. It can be seen that force can change the state of motion of an object.

But force is not the factor that maintains the state of motion of an object, the factor that maintains the state of motion of an object is inertia.

The state of motion of the object changes, and the true reflection of the state of motion is the speed of the object's motion, including the magnitude and direction of the velocity, therefore, the change of the state of motion of the object is the change of the velocity of the object, that is, the acceleration of the object, according to Newton's second theorem formula: f=ma, a is the acceleration of the object, m is the mass of the object, and f is the resultant external force experienced by the object. Therefore, the existence of acceleration a is based on the resultant external force f, which arises and disappears at the same time.

When the resultant external force f is 0, the acceleration a is also 0, and the acceleration is 0, the velocity of the object does not change, that is, it moves in a straight line with uniform velocity. Therefore, when the resultant external force is 0, the object is at rest or moves in a straight line at a uniform speed. When f is not 0, the object accelerates with acceleration a.

So, force can change the state of motion of an object.

Yes, the state of motion of the object will never change if it is not subjected to force, the static is constant and the moving is perpetual (uniform linear motion).

According to Newton's laws, force is what changes the state of motion of an object. In the absence of force, the object will move in a straight line at a uniform speed.

More than 2,000 years ago, the ancient Greek scholar Aristotle believed that force is the cause of maintaining the motion of objects, which seems to be very similar to what we know.

More than 400 years ago, Galileo Galilei proposed that force is not what sustains the motion of an object, but what changes it.

In 1644, Descartes further developed a new theory, which meant that if not acted on by force, an object would maintain a uniform linear motion.

In 1687, Newton published the famous "Mathematical Principles of Natural Philosophy", which formally proposed Newton's first law, which means that if there is no force to act, an object will always maintain a uniform linear motion or a state of rest.

Students who have gone to junior high school physics should not hesitate to shout that force is the reason for changing the state of motion of objects.

This is not only that we were born more than 400 years later than Galileo, but also because we have experienced a full 9 years of compulsory education, if there is no 9 years of compulsory education, we can rely on ourselves to cover our heads, even if we are born 400 years later, we may still think that force is the reason for maintaining the motion of objects, after all, the understanding in life is: I push you, you will move.

Now think about it very simply, force is the cause of changing the state of motion of an object, and the object remains in its original state when it is not acted on by force, either at rest or in a uniform linear motion.

The force is what changes the state of motion of the object, that is, what produces the acceleration.

The motion of an object does not require force to sustain it, and the motion of an object is determined by its own properties (inertia).

If it is not subjected to force, it will remain stationary when it is stationary, and it will maintain a uniform linear motion state when it is moving.

Newton's second law of motion was proposed by Isaac Newton in his book Principles of Mathematics in Natural Philosophy in 1687. Newton's second law of motion and the first.

The first and third laws together constitute Newton's laws of motion, which expound the basic laws of motion in classical mechanics.

Features of Newton's second law of motion

1. Transience: Newton's second law of motion is the instantaneous effect of force, acceleration and force are generated, changed and disappeared at the same time.

2. Vector: It is a vector expression, and the direction of acceleration and resultant force is always the same.

3. Independence: The object is affected by several external forces, and the acceleration produced under the action of an external force is only related to this external force, and has nothing to do with other forces, and the vector sum of the acceleration generated by each force is equal to the acceleration produced by the combined external force, and the combined acceleration is related to the combined external force.

4. Causality: force is the cause of acceleration, acceleration is the effect of force, so force is the cause of changing the motion state of the object.

The force can change the state of motion of an object, but it is not the state of motion that sustains the force. But when there are two or more forces acting on the same object at the same time, if the object is still in a state of rest, a state of constant speed and straight wire motion, and the net force is zero, then the net force of these several forces is zero, then we say that these forces are balanced. When an object is subjected to a balanced force, the state of motion of the object does not change.

Force can change the shape and motion of an object. There are three effects of force: 1. Force can change the shape of an object and deform it.

2. Force can change the state of motion of an object (velocity, direction of motion, at least one of the two will change). 3. The force keeps the object at a constant speed.

What is the nature of force 1. Materiality: Force is the action of an object (matter, mass) on an object (matter, mass), an object is affected by a force, there must be another object to exert this limb effect on it, and force cannot exist independently from the object.

2. Reciprocity (interaction force): The action between any two objects is always mutual, and the force object must also be the force object. As long as one object exerts a force on another object, the stressed object in turn will certainly add a force to the object to which the force is applied.

Generating conditions: The forces are equal in magnitude (the resultant force is zero and in a directionless state of stationary motion) or unequal, in opposite directions, acting on two different objects and acting on the same straight line. In a nutshell:

Foreign Body, Equivalence, Inverse, Collinear. A pair of interacting forces must arise and disappear at the same time. ）

3. Vector: Force is a vector, which has both magnitude and direction.

4. Simultaneity: the force is generated at the same time and disappears at the same time.

5. Independence: The action of one force does not affect the action of another.