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If the time and distance of two objects are not the same, what is used to express the speed of motion in physics
Velocity! To be exact, velocity. V = s / T
What is the average speed______ A moving object is a physical quantity of how fast it moves. It can only control movement______ Description, from______ From the point of view of the average speed of movement, we can see the allusions of the tortoise and the rabbit race, and the results show that______ The average speed of is greater than______ The average speed of the engine
The average speed is a physical quantity reflecting the speed of an object moving with variable speed. It can only describe the motion roughly. From the point of view of the average speed of variable speed, we can see the allusion of tortoise and rabbit race. The result shows that the average speed of tortoise is greater than that of rabbit. So the answer is: variable speed; rough speed; variable speed; tortoise; rabbit
Speed is the physical quantity of () which is called speed. The speed of an object is described by () or ()
Speed is a physical quantity that represents the speed of an object
The speed of an object's motion can be described by (M / s) or (km / h)
As for speed, the following is true ()
A. Speed is a physical quantity to describe the speed of an object's movement. High speed means fast movement. B. high speed means fast position change of an object. C. The higher the speed is, the faster the position change is, the greater the displacement is. D. if the position of an object remains unchanged for a period of time, the speed of the object will be zero
A. The physical meaning of speed is to describe the physical quantity of the movement speed of an object. Large speed means that the object moves fast, so a is correct and B is wrong. C. the larger the speed is, the faster the position changes, but the displacement means the size of the position change. Large speed means that the displacement is not necessarily large, so C is wrong. D. the position does not change, and the displacement is zero, so the speed is zero, so D is correct
For a job, it takes 6 hours for a person to do it alone and 4 hours for B. after a few hours of working together, there is still a lot of work left?
The working efficiency of Party A and Party B's cooperation is: 16 + 14 = 512, their workload is: 1 − 13 = 23, so the working time is: 23 △ 512 = 85 (hours) a: after 85 hours of cooperation, there is still this work left & nbsp; 13
The total amount of work divided by the working hours is equal to the work efficiency. What is certain and what is proportional to what
Working time x working efficiency = total amount of work
The work efficiency is certain, the working time is proportional to the total amount of work
The total amount of work is fixed, and the working time is inversely proportional to the total amount of work
The working time is fixed, the working efficiency is proportional to the total amount of work!
Work time * work efficiency = total amount of work, when the total amount of work is fixed, () and () are proportional
Working hours * working efficiency = total amount of work,
When the total amount of work is fixed,
Working hours and efficiency are in inverse proportion
How to find the distance between speed and time
For example, △ t = 2S V1 = 340m / s V2 = 5000m / S
If it's a uniformly accelerating linear motion, then it can be calculated as follows
S=△T*(V1+V2)/2=5340m
You can use the V-T graph. The distance is the area between the image and the positive direction of the T-axis and the positive direction of the v-axis
What times the time of meeting equals the distance between the two places
Speed
Speed times time equals?
kkk
A: speed times time equals distance
RELATED INFORMATIONS
- 1. Speed is a physical quantity that describes the speed and direction of an object, Why do some exercises only write "describe how fast an object moves" without mentioning direction
- 2. In English
- 3. All the formulas of physical acceleration are those for time and velocity
- 4. The average speed is a rough description of how fast an object moving at variable speeds moves at -- or
- 5. If the average speed of an object moving in a variable speed straight line is 6m / s in the first half of the distance and 10m / s in the second half of the distance, the average speed in the whole distance is () A. 7.04m/sB. 7.50m/sC. 8m/sD. 8.24m/s
- 6. From the formula of uniform linear motion v = s / T, it can be seen that the velocity is equal to the ratio of displacement to time, which has nothing to do with velocity and displacement. Why is it wrong
- 7. Velocity displacement formula
- 8. According to the velocity formula v = s / T, what is correct in the following statement? A. The speed of an object is proportional to its distance B. The speed of an object is inversely proportional to time C. The speed of an object is directly proportional to its distance and inversely proportional to its time D. The speed of the object is constant and has nothing to do with the distance time reason
- 9. How to find the surface area and volume of a cube or cuboid
- 10. Calculation formula of volume, surface area and side area of cone
- 11. In physics, the ratio of the distance an object passes through to the time it takes is called the ratio of the motion of an object_____ It means how fast an object moves in the process
- 12. What do the English letters K, l, h and N on the architectural drawings mean?
- 13. In high school physics, the average speed is the displacement divided by time. Then, there are several time periods in the whole process where the displacement is different from the time used. At this time, what is the average speed of the whole process,
- 14. What is the difference between instantaneous velocity and average velocity
- 15. The solution of physical velocity in the first grade of high school After the train starts, it leaves the station for a uniform acceleration and straight-line movement. When people at the front end of the first carriage see the second carriage passing him for 5 seconds, how long does the sixth carriage pass him? Detailed process... First floor 1: √ 2-1: √ 3 - √ 2: Where did you come from? Can you explain it in detail
- 16. What's the image of uniform velocity linear motion
- 17. The formula of velocity is v = △ X / △ T. is v the average velocity or the velocity? What's the difference between the average velocity and the velocity
- 18. In senior high school physics compulsory one, there is an experiment of uniform linear motion, which requires the instantaneous velocity of a point on the paper tape. I know it needs to be estimated when measuring the displacement. But what about the velocity obtained by dividing the displacement by time? What about the acceleration? If the difference between the two displacements is just an integer? Do you want to add. 000 after the velocity
- 19. Is the speed of sound in the air average or instantaneous? Is the speed from Shanghai to Suzhou average or instantaneous?
- 20. Specific physical meaning