Learning-physics-by-simulation/learning vpythono at main · arindam-codes/Learning-physics-by-simulation · GitHub

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kda@pop-os:~$ ipython
Python 3.10.12 (main, Nov  4 2025, 08:48:33) [GCC 11.4.0]
Type 'copyright', 'credits' or 'license' for more information
IPython 8.37.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: import vpython

In [2]:
Do you really want to exit ([y]/n)?
kda@pop-os:~$
kda@pop-os:~$
kda@pop-os:~$ ipython
Python 3.10.12 (main, Nov  4 2025, 08:48:33) [GCC 11.4.0]
Type 'copyright', 'credits' or 'license' for more information
IPython 8.37.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: import vpython

In [2]: dist = sqrt(2.5 ** 2 + 0.3 ** 2 + (-2) ** 2)
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
Cell In[2], line 1
----> 1 dist = sqrt(2.5 ** 2 + 0.3 ** 2 + (-2) ** 2)

NameError: name 'sqrt' is not defined

In [3]: from math import *

In [4]: dist = sqrt(2.5 ** 2 + 0.3 ** 2 + (-2) ** 2)

In [5]: dist
Out[5]: 3.215587038162705

In [6]: print(mag(2.5, 03, -2))
  Cell In[6], line 1
    print(mag(2.5, 03, -2))
                   ^
SyntaxError: leading zeros in decimal integer literals are not permitted; use an 0o prefix for octal integers


In [7]: print(mag(2.5, 0.3, -2))
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
Cell In[7], line 1
----> 1 print(mag(2.5, 0.3, -2))

NameError: name 'mag' is not defined

In [8]: vector = vetor(2.5, 0.3, -2)
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
Cell In[8], line 1
----> 1 vector = vetor(2.5, 0.3, -2)

NameError: name 'vetor' is not defined

In [9]: vector = vector(2.5, 0.3, -2)
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
Cell In[9], line 1
----> 1 vector = vector(2.5, 0.3, -2)

NameError: name 'vector' is not defined

In [10]: from vpython import *

In [11]: vector = vector(2.5, 0.3, -2)

In [12]: mag(vector)
Out[12]: 3.215587038162705

In [13]: a = vector(1,2,3)
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[13], line 1
----> 1 a = vector(1,2,3)

TypeError: 'vpython.cyvector.vector' object is not callable

In [14]: a = vector(1,2,3)
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[14], line 1
----> 1 a = vector(1,2,3)

TypeError: 'vpython.cyvector.vector' object is not callable

In [15]: 00
Out[15]: 0

In [16]: 0 0
  Cell In[16], line 1
    0 0
      ^
SyntaxError: invalid syntax


In [17]: C
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
Cell In[17], line 1
----> 1 C

NameError: name 'C' is not defined

In [18]: restart kernel
  Cell In[18], line 1
    restart kernel
            ^
SyntaxError: invalid syntax


In [19]:
Do you really want to exit ([y]/n)?
kda@pop-os:~$  00
00: command not found
kda@pop-os:~$ 0 0
0: command not found
kda@pop-os:~$ restart kernel
Command 'restart' not found, did you mean:
  command 'restartd' from deb restartd (0.2.3-1.1)
  command 'rstart' from deb x11-session-utils (7.7+4build2)
Try: sudo apt install <deb name>
kda@pop-os:~$ ipython
Python 3.10.12 (main, Nov  4 2025, 08:48:33) [GCC 11.4.0]
Type 'copyright', 'credits' or 'license' for more information
IPython 8.37.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: a = vector(1,2,3)
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
Cell In[1], line 1
----> 1 a = vector(1,2,3)

NameError: name 'vector' is not defined

In [2]: from vpython import *

In [3]: a = vector(1,2,3)

In [4]: a_hat = hat(a)

In [5]: print(a_hat)
<0.267261, 0.534522, 0.801784>

In [6]: mag(a_hat)
Out[6]: 1.0

In [7]: ri = vector(-0.5, 3, 0)

In [8]: v = vector(0, -0.01, 0)

In [9]: rf = ri + v * 20

In [10]: rf
Out[10]: vector(-0.5, 2.8, 0)

In [11]: mag(rf)
Out[11]: 2.8442925306655784

In [12]: rf - ri
Out[12]: vector(0, -0.2, 0)

In [13]: (rf - ri)  / v
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[13], line 1
----> 1 (rf - ri)  / v

TypeError: unsupported operand type(s) for /: 'vpython.cyvector.vector' and 'vpython.cyvector.vector'

In [14]: mag(rf - ri) / mag(v)
Out[14]: 20.000000000000018

In [15]: t = dot(rf - ri, v) / dot(v, v)
    ...:

In [16]: t
Out[16]: 20.000000000000018

In [17]:
Do you really want to exit ([y]/n)? n

In [17]: