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Created April 7, 2020 13:01
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HW1
#속도 성분들
from sympy.physics.vector import *
from sympy.physics.vector import dynamicsymbols
E = ReferenceFrame('E')
E.x
E.y
E.z
from sympy import Symbol, symbols
diff(r)*E.x + r*diff(theta)*E.y
#가속도 성분들
(diff(diff(r))-r*theta**2)*E.x + (r*diff(diff(theta))+2*diff(r)*diff(theta))*E.y
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