Physical resultant force problem, physical resultant force and component force

The key is to understand the principle of a spring dynamometer.

If, according to T T1102, no matter what force is measured, because the spring scale is stationary when the force is measured, then the resultant force is zero? This is clearly not true.

If there is only one force to pull the spring scale, even if this force is greater, the spring scale will not deform and the reading will still be zero. A reading is only available when two opposite, equal forces act on a spring scale, and this reading is the magnitude of one of the forces.

The method of finding the resultant force is: (1) When the direction of the two forces is the same, the resultant force is equal to the sum of the two forces.

2) When the two forces are in opposite directions, the resultant force is equal to the difference between the two forces (i.e., the large force minus the small force), and the two forces in this problem are equal in magnitude and opposite in direction. So the resultant force is 0.

Readings of the spring scale: (1) Fix one end of the spring scale, pull it with a force of 1000 N at one end, and its indication is 1000 years. (2) Pulling with a force of 1000 N at both ends of the spring scale at the same time, since the force of the object is reciprocal, the result is the same as in the first case.

The reading is also 1000 N.

When measuring the force, the spring scale is stationary, so the resultant force is zero? This is not right.

When two opposite, equal forces act on a spring scale, there is a reading, and this reading is the magnitude of the force.

You can assume that one of the horses is stationary, which means that the spring dynamometer is fixed at one end and the other end is pulled by 1000 N, so although the resultant force is zero, it does show 1000

The relationship between the resultant force and the component force: 1. The resultant force is between the sum of the component force and the difference between the component force. 2. The resultant force can be greater than any component, or it can be less than any component, the key is to look at the angle between the two components.

The smaller the angle, the greater the resultant force. 3. The magnitude of the resultant force is the magnitude obtained by the parallelogram operation of the vector force. 4. The direction of the resultant force is also obtained by the parallelogram operation method of the vector.

5. The effect of the resultant force and the component force is the same.

The resultant force is the sum of all the external forces experienced by an object.

If the effect of several forces acting on a particle is the same as that of a force f, then this force f is called the resultant force (equivalent).

The direction of force f is the direction of the combined force of several forces.

Force is a vector quantity, and the resultant force refers to the vector sum of multiple forces acting on the same object together. The resultant force is a vector quantity, and the addition and subtraction of vectors satisfies the parallelogram rule and the triangle rule.

Principle and application:

The direction of force f is the direction of the synthesis of several forces.

Force is a vector quantity, and the resultant force refers to the vector sum of multiple forces acting on the same object together. The resultant force is a vector quantity, and the addition and subtraction of the vector satisfies the quadrilateral rule and the triangle rule.

If the two forces are not collinear, the direction of the diagonal is the direction of the resultant force.

If the direction of the two forces is the same, then the resultant force is equal to the sum of the two forces and the direction does not change.

If the direction of the two forces is opposite, then the net force is equal to the difference between the two forces in the same direction as the force of a little larger dust mass.

If the two forces are equilibrium forces (equilibrium forces of equal magnitude and opposite directions), the resultant force is zero. ∑f=0。

An object placed on a smooth, frictionless inclined plane is acted upon by two forces: gravity g, and the supporting force f on the inclined plane. See image below

Their resultant force is: f conjunction (below).

<> can find sin from the length and height of the inclined plane

sin = opposite edge hypotenuse.

The "plane" mentioned in your question is unknown, and there is no alternative answer. ）

When an object is placed on a frictionless inclined plane, it is only subjected to the gravitational and inclined plane support forces. What these two forces combine is the net force to which it is subjected. According to the parallelogram rule, the magnitude of the resultant force is the sine value of gravity multiplied by the inclination angle of the inclined plane, i.e., the ox.

Don't see any of the following options?!

There are two inclined planes with different inclinations, the same height, and the same mass placed on a smooth horizontal m plane, and the bevel is also smooth. The cycloid length is l, as shown in the figure, the pendulum can complete a complete circular motion in the vertical plane.

The concept of resultant force.

Resultant force: If the effect of one force is the same as that of two forces acting together, this force is called the resultant force of the two forces.

Understanding: The concept of resultant force is based on "equivalence", that is, the resultant force "replaces the component force", so the resultant force is not another force acting on the object, it is just a substitute for the two forces acting on the original force, do not mistake the object for the action of the resultant force at the same time. The condition for the synthesis of two forces is that the two forces must act on an object at the same time, otherwise it is meaningless to find the resultant force.

Synthesis of forces. The magnitude and direction of several forces are known, and finding the magnitude and direction of the resultant force is called the synthesis of forces.

1) When two forces are in the same direction, the magnitude of their resultant force is equal to the sum of these two forces; The direction is the same as the direction of the two forces Mathematically: f = f1 + f2

2) When the two forces are in opposite directions, the magnitude of their resultant force is equal to the difference between the two forces, and the direction is the direction of the larger force Mathematical expression: f = f1 - f2 (where: f1 > f2).

If several forces act together on an object in the same way as if only one other force were acting on that object alone, then that other force is called the resultant force of those forces.

The resultant force is the reason for the motion of the object. An object may be subjected to many forces, but according to its state of motion, we can know the direction of its resultant force, and the direction of the component force is decomposed according to our needs.

The physical effect produced by several forces of different magnitudes and directions acting together on an object is the resultant force.

Hope it helps.

1.Resultant force and component force: If several forces acting together produce the same effect on an object as a force acting on an object alone, then these forces are called the resultant force of this force, and those forces are called the components of this force.

2. Synthesis and decomposition of force.

It is known that the component force requires a resultant force, which is called the synthesis of force. It is known that the resultant force requires a component called the decomposition of the force.

3. The law of force synthesis and decomposition: the law of parallelogram. That is, the synthesis of forces is a problem of finding diagonals from the two adjacent sides of a parallelogram.

The decomposition of the force is a problem of the adjacent sides of the autumn by the diagonal. Note: When decomposing a force according to the parallelogram rule, it should be done according to the actual effect of the force or the orthogonal decomposition method.

The law of parallelograms finds the resultant force.

Choose the gravity of the C basketball g=mg=

Because. Basketball is on the rise.

Subjected to downward gravity, there is resistance against the speed of movement.

The resultant force f=g-f=5-1=4n

Basketball falling process.

The direction of gravity does not change.

The reversal of resistance is opposite to the direction of motion.

It becomes upward, so the net force f=g-f=5-1=4n