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# Untitled

a guest Dec 13th, 2018 50 Never
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1. from visual import *
2. from visual.graph import *
3.
4. scene.width=800
5. scene.height=800
6. scene.range=(16,16,16)
7. scene.autoscale = 0
8. scene.center=(0,12,0)
9. scene.background=color.white
10.
11. ball = sphere(pos=(0,20,0), radius=1, color=color.red)
12. ground=box(pos=(0,-0.1,0), size=(24,0.2,5),color=color.green)
13. accel=vector(0,-9.8,0)
14.
15.
16. print ('The acceleration is:', accel)
17.
18. ball.velocity=vector(0,0,0)
19. dt=0.005
20. t=0
21.
22. bv=arrow(pos=ball.pos, axis=ball.velocity, color=color.yellow)
23. time=0.0
24. display2=gdisplay(background=color.white,foreground=color.black)
25. poscurve=gcurve(color=color.blue)
26. velcurve=gcurve(color=color.orange)
27. while t<10:
28.     time=time+dt
29.     rate(1.0/dt)
30.     bv.pos=ball.pos
31.     bv.axis=ball.velocity
33.             ball.velocity.y=-ball.velocity.y
34.     ball.velocity=ball.velocity+accel*dt
35.     ball.pos=ball.pos + ball.velocity*dt
36.     poscurve.plot(pos=(time,ball.pos.y))
37.     velcurve.plot(pos=(time,ball.velocity.y))
38.     print (ball.velocity.y, ball.pos.y)
39.
40.     t=t+dt
41. analyticposcurve=gcurve(color=color.green)
42. for taco in range(0,400,1):
43.     analyticposcurve.plot(pos=(taco/200,(20+0.5*accel.y*taco**2)/200))
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