What does physical image intersection mean

It means meeting

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1. (consult physics expert) when the force of an object meets what conditions, the trajectory is a parabola (part of)?
2. Is the trajectory of projectile a parabola? It's not a flat throw
3. It is proved that the trajectory of an object in horizontal motion is a parabola
4. How to judge whether an object's trajectory is a straight line or a parabola?
5. As shown in the figure, there is an object with a mass of M = 2kg at o on a smooth horizontal plane. The object is subjected to two horizontal forces, F1 = 4N, F2 = (2 + 2x) n, and X is the displacement of the object relative to O. the object starts to move from rest. Question: (1) when the displacement is x = 0.5m, what is the acceleration of the object? (2) Where is the maximum acceleration of the object? What is the maximum value? (3) Where is the object's maximum velocity? What is the maximum value?
6. A question about sports physics When an object moves in a straight line with constant speed change, it is impossible that () A. The speed change in the first second is less than that in the second second B. The displacement in the first second is less than that in the second C. The average speed in the first second is equal to the average speed in the second second D. The displacement difference in the first and second seconds is equal to the displacement difference in the third and fourth seconds Please explain the reason, thank you
7. There is an aircraft flying at an altitude of 490m at a constant speed of 80m / s. when an object is dropped from the aircraft, how many meters is the distance between the object and the aircraft? The answer is 100 But I think the plane and the object are moving the same horizontal distance?
8. A physical problem with the nature of motion Does the velocity of horizontal uniform linear motion and vertical uniform linear motion keep the same Doesn't it mean that the velocity perpendicular to the direction of acceleration doesn't change
9. Physics problems about motion After braking, a stops 36 meters ahead within 3 seconds, B stops after 1.5 seconds, B advances () A.9m B.36m C.18m D.72m
10. Volume calculation formula of bow Urgent, online, etc...
11. On the physical aspect of XT graph In XT graph, when the line in the graph starts from zero, it moves up first. When it reaches a point, it moves down again. When v reaches zero, it continues to fall below zero. When it goes up, it's a positive speed. I don't know if the zero point is turning around from time to time when I go down. If it's below zero point, it's back to the starting point and moving in another direction Compulsory one in senior one
12. XT image Are all lines represented in XT images? What does a curve represent?
13. Why is the trajectory of an object a parabola? Who first discovered the parabola?
14. If a (1,2) is outside the parabola y ^ 2 = 2x, P moves on the parabola Find the maximum value of | PA | - | Pb |
15. As shown in the figure is the law of the displacement of a particle moving with time, the image is a parabola, and the equation is x = - 5T2 + 40t A. The maximum displacement of the particle is 80 & nbsp; MB. The initial velocity of the particle is 20 & nbsp; m / sc. when the acceleration of the particle is 5m / S2D. T = 4S, the velocity of the particle is zero
16. Why is the X-ray image of physics uniform acceleration in grade one of senior high school a parabola?
17. A physical phenomenon, there are also calculation methods When we turn on the tap, we will find that the diameter of the continuous flow column is shrinking. Why? Is there any calculation method? What is the relationship between the height, the diameter before falling and the diameter at the lowest? How to calculate?
18. Formula for calculating buoyancy by balance method
19. How can I do the physical calculation? I can't set the formula. What should I do I have been studying physics for nearly two years, and I don't know how to do it
20. There are several ways to calculate buoyancy in physics