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Is the trajectory of projectile a parabola? It's not a flat throw
The trajectory of projectile motion is not necessarily a parabola, for example, the trajectory of vertical upward motion is a straight line
----First, make a uniform deceleration motion upward, and then make a uniform acceleration motion downward after reaching the top
-----A track is a straight line segment
The trajectory of horizontal and oblique throwing motion is parabola, which is no problem, but the trajectory of vertical throwing motion is not parabola. Here we need to understand what is projectile motion and what is trajectory!
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- 1. It is proved that the trajectory of an object in horizontal motion is a parabola
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- 3. 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?
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- 17. 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
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