What is the short name of instantaneous velocity? What is the short name of instantaneous velocity?

Instantaneous speed is called speed for short; instantaneous speed is called speed for short

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1. Speed is the magnitude of instantaneous speed?
2. Are velocity and average velocity vectors
3. Average velocity, average velocity, instantaneous velocity, instantaneous velocity, average acceleration, instantaneous acceleration The size of vector is scalar. When similar concepts are used in the above concepts, will there be a logic error?
4. Why is physical velocity the size of velocity If you run around a circle, the displacement is 0, so the speed is 0, but the speed should not be 0
5. What's the difference between speed and speed? Ask for advice. In addition, the variation of velocity rate with time is not uniform, but the variation of velocity with time is uniform. How to understand
6. The average speed is the distance divided by time. Then an object accelerates in the first second, stops in the second second, decelerates and accelerates in the third second within 10 seconds. The result is that the distance is 100 m, the displacement is 10 m, but the time is 10 s, so the average speed is 10 m / S? The average speed is 1 m / S? No matter what the distance is, our average speed and speed, It's just emphasized that if he uses uniform speed, it's just the speed. I've figured it out,
7. What's the difference between velocity and velocity in physics?
8. What's the difference between velocity and velocity in physics?
9. What's the difference between average velocity and average velocity in physics
10. What's the meaning of the velocity image? There seem to be five
11. Instantaneous velocity and instantaneous rate In the VT diagram, when the limit is removed, why can the instantaneous displacement and the distance be regarded as equal?
12. The relationship and difference among instantaneous rate, average rate and rate
13. The radius of circular motion of a satellite in a broken orbit is approximately equal to that of an object rotating with the earth on the equator, but the angular velocity and linear velocity of the satellite are larger
14. The radius of the earth is 6400 km, and the latitude of Beijing is 40 degrees. What are the angular and linear velocities of the two objects located in Beijing and the equator?
15. What are the linear and angular velocities of the two objects in Beijing with latitude of 40 degrees and at the equator moving in a uniform circular motion with the rotation of the earth? The radius of the earth is 6400km
16. The rotation period is 2S, 7 / s, the radius of circular motion?
17. The relationship between centripetal force, period and radius of an object in circular motion
18. What are the linear velocity, period and angular velocity of an object moving in a circle with a radius of 20m for 100m within 10s?
19. If the angular velocity ratio of a and B particles in circular motion is 3:1 and the linear velocity ratio is 2:3, what is the radius and period ratio? Circular motion
20. Physical circular motion, but also to master the difficulty, to be clear