How to calculate the inertia force
Publish: 2021-05-12 09:33:34
1. In the linear motion, f inertia = - Ma, in the uniform rotation reference frame, f inertia = MRW ^ 2, R is outward along the radius. If the object still moves in the rotating reference frame, it will also be affected by the Coriolis force, fko = 2mwv, where V is the velocity of the object relative to the rotating reference frame.
2. In the inertial system, the acceleration of that person is the same as that of a car, which has nothing to do with friction.
3.
The size of inertia is only related to the mass of the object. Inertia is directly proportional to the mass of the object. In physics, inertia is the property of the object to resist the change of its motion state. The inertia of an object can be measured by its mass. The greater the mass, the greater the inertia
More specifically, Newton's first law shows that there are some reference frames in which objects that are not subject to external forces keep still or move in a straight line at a constant speed, and the principle of inertia is the basic principle of classical mechanics 
extended data:
all objects have inertia, which has nothing to do with whether they move or bear force. It is an attribute of an object. An object has the property of keeping the original motion (or static) state, which is called inertia. All objects have inertia
points for attention when calculating inertia:
1. Inertia is not equal to the law of inertia. Inertia is the nature of the object itself, and the law of inertia is about the relationship between motion and force (force is not the reason to maintain the motion of the object, force is the reason to change the motion of the object)
Inertia is an inherent attribute of an object. We can't say "get inertia" because of inertia, but "have inertia" correctly4. Earthquake load: (DI Zhen He Zai) earthquake load (seismic force)
the earthquake force is the inertial force, the earth pressure and the water pressure of the structure are generally considered as the horizontal vibration e to the influence of the horizontal vibration building
the calculation formula of earthquake force: earthquake force = self weight × Seismic coefficient
compared with steel-concrete structure, all steel structure has the characteristics of light self weight, and the self weight of steel structure is about three or two of steel-concrete structure. According to the above calculation, the self weight of light steel structure can alleviate the seismic force and protect the stability of the whole building
the earthquake force is the inertial force, the earth pressure and the water pressure of the structure are generally considered as the horizontal vibration e to the influence of the horizontal vibration building
the calculation formula of earthquake force: earthquake force = self weight × Seismic coefficient
compared with steel-concrete structure, all steel structure has the characteristics of light self weight, and the self weight of steel structure is about three or two of steel-concrete structure. According to the above calculation, the self weight of light steel structure can alleviate the seismic force and protect the stability of the whole building
5. It depends on how long you stop, as well as the quality and speed of the car. The inertia force formula F = ma, assuming that the mass of the car is 1500kg, the braking speed is 100km / h, the car is fully braked in 1 second, and the acceleration reaches 27.77m/s2, then the inertia force is f = 1500 × 100000 / 3600) = 4.17t. At this time, the braking distance is about 14m (which can't be done by racing car). If the normal emergency braking distance is 40m, the braking time is about 2.9s, and the inertia force F = 1.45t. If calculated according to the crash, assuming that the vehicle head collapse distance is 1m, then the acceleration is 385m / S2, the car's inertial force F = 57.85t, and the human's inertial force 2.9t (assuming the body weight is 75kg) is amazing~~
6. Inertial force inertial force refers to when the object accelerates, the inertia will make the object tend to maintain the original state of motion. If the object is taken as the coordinate origin, it looks as if there is a force in the opposite direction acting on the object, so it is called inertial force. Because the inertial force does not exist, only the force that accelerates the object actually exists, so the inertial force is also called the imaginary force. Its concept is put forward because Newton's law of motion is not applicable in non inertial frame. But for the convenience of thinking, it can be assumed that in this non inertial frame, in addition to the forces caused by interaction, there is also a force caused by the non inertial frame inertial force. When there is an acceleration a in the system, the magnitude of the inertial force follows the formula: F = - MA (M is the mass of the object)
for example, when the bus brakes, the people on the bus lean forward because of the inertia, and the people on the bus seem to have a force pushing them forward, which is called inertial force. However, only the friction force acting on the brakes and tires of the bus makes the bus slow down. In fact, there is no force to push the passengers forward, which is just the phenomenon of inertia in different coordinate systems
the introction of inertial force is a great shame of Newton mechanics. It is an imaginary force introced to make up for the fact that the motion of objects in non inertial reference frame does not meet Newton's law of motion
imagine a stationary train with a small ball on a smooth table in the carriage. The ball was originally stationary; Now the train starts to accelerate. In the view of the people on the ground (obviously he chose an inertial reference frame - ground), the ball does not move. But in the view of the people on the train, the ball moves in the direction opposite to that of the train, and the acceleration is equal to that of the train, but in the opposite direction. The force analysis of the ball is carried out, The small ball is only affected by gravity and supporting force, and the two forces are balanced in the vertical direction. According to Newton's law of motion, the small ball will not move in any case, but in fact, the car will see the small ball moving. This is a limitation of Newtonian mechanics. In order to make up for this defect, we introce the concept of "inertial force". On an object in a non inertial frame, we think that an acceleration equal to the value of the non inertial frame and in the opposite direction is added. Because the "acceleration" is caused by inertia, the force that causes the "acceleration" is called inertial force, In this way, the phenomenon observed by people on the train can be explained formally. This is just to study the problem by applying Newton's law of motion in non inertial frame. In fact, inertia is the property of the object itself, not the force
the inertia force can explain why the resistance is less than the force, while the reaction force is equal to the force
in the study of the motion of the earth's surface atmosphere and water, the geostrophic deflection force is often used as an inertial force. It is also very useful to study the motion of stars in space science, such as why asteroids are torn when they are close to Jupiter (the interaction of inertial force and gravity makes asteroids split), and why comet tails have a deflection angle when they are close to the sun.
for example, when the bus brakes, the people on the bus lean forward because of the inertia, and the people on the bus seem to have a force pushing them forward, which is called inertial force. However, only the friction force acting on the brakes and tires of the bus makes the bus slow down. In fact, there is no force to push the passengers forward, which is just the phenomenon of inertia in different coordinate systems
the introction of inertial force is a great shame of Newton mechanics. It is an imaginary force introced to make up for the fact that the motion of objects in non inertial reference frame does not meet Newton's law of motion
imagine a stationary train with a small ball on a smooth table in the carriage. The ball was originally stationary; Now the train starts to accelerate. In the view of the people on the ground (obviously he chose an inertial reference frame - ground), the ball does not move. But in the view of the people on the train, the ball moves in the direction opposite to that of the train, and the acceleration is equal to that of the train, but in the opposite direction. The force analysis of the ball is carried out, The small ball is only affected by gravity and supporting force, and the two forces are balanced in the vertical direction. According to Newton's law of motion, the small ball will not move in any case, but in fact, the car will see the small ball moving. This is a limitation of Newtonian mechanics. In order to make up for this defect, we introce the concept of "inertial force". On an object in a non inertial frame, we think that an acceleration equal to the value of the non inertial frame and in the opposite direction is added. Because the "acceleration" is caused by inertia, the force that causes the "acceleration" is called inertial force, In this way, the phenomenon observed by people on the train can be explained formally. This is just to study the problem by applying Newton's law of motion in non inertial frame. In fact, inertia is the property of the object itself, not the force
the inertia force can explain why the resistance is less than the force, while the reaction force is equal to the force
in the study of the motion of the earth's surface atmosphere and water, the geostrophic deflection force is often used as an inertial force. It is also very useful to study the motion of stars in space science, such as why asteroids are torn when they are close to Jupiter (the interaction of inertial force and gravity makes asteroids split), and why comet tails have a deflection angle when they are close to the sun.
7. Look at the acceleration of the reference frame you choose. Then the relative acceleration multiplied by the mass of the object is the so-called inertial force.
8. The calculated kinetic energy 1 / 2 mass value multiplied by "the power of velocity value" (the velocity of a relatively delicate reference object) corresponds to Joule (size)
or momentum ft = MV (with direction)
or momentum ft = MV (with direction)
9. Let me answer, inertial force
inertial force means that when an object accelerates, inertia will make the object tend to maintain its original state of motion. If the object is taken as the coordinate origin, it looks as if there is an opposite force acting on the object, so it is called inertial force. Because the inertial force does not exist, only the force that accelerates the object actually exists, so the inertial force is also called the imaginary force. When there is an acceleration a in the system, the magnitude of the inertial force follows the formula: F = - Ma
(M is the mass of the object)
for example, when the bus brakes, the people on the bus lean forward because of the inertia, and the people on the bus seem to have a force pushing them forward, which is called inertial force. However, only the friction force acting on the brake and tire of the bus makes the bus slow down. In fact, there is no force to push the passengers forward, which is just the phenomenon of inertia in different coordinate systems
18035 hope to help you!
inertial force means that when an object accelerates, inertia will make the object tend to maintain its original state of motion. If the object is taken as the coordinate origin, it looks as if there is an opposite force acting on the object, so it is called inertial force. Because the inertial force does not exist, only the force that accelerates the object actually exists, so the inertial force is also called the imaginary force. When there is an acceleration a in the system, the magnitude of the inertial force follows the formula: F = - Ma
(M is the mass of the object)
for example, when the bus brakes, the people on the bus lean forward because of the inertia, and the people on the bus seem to have a force pushing them forward, which is called inertial force. However, only the friction force acting on the brake and tire of the bus makes the bus slow down. In fact, there is no force to push the passengers forward, which is just the phenomenon of inertia in different coordinate systems
18035 hope to help you!
Hot content