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Hints for Assignment 22

10.36   Note that the ordinary acceleration is tex2html_wrap_inline1942, where tex2html_wrap_inline1783 is the ordinary velocity. Partial answers: (b)
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(d) tex2html_wrap_inline1946

10.37  This one can be done with the connection between K and F, or you can do it using the results of 10.36.

10.39   Both the field and the plates get transformed. Use Lorentz and Pythagoras to handle the plate angle and unit vectors to find the angle between the plates and tex2html_wrap_inline1082. Partial answer: the field is not perpendicular to the plates in S.

10.40   (a) Do the surface integral of Eq. 10.103 over a sphere using spherical coordinates. (b) When he says find tex2html_wrap_inline1954 he means finds tex2html_wrap_inline1956, valid for all points in space using spherical coordinates.

10.47   This is an exercise in playing with tensor multiplication using index notation. Use the fact that tex2html_wrap_inline1958 is symmetric and start with
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10.50   You will find that F changes but G stays the same. If the new tensor is called tex2html_wrap_inline1964, then you are to build it so that it involves only D and H and satisfies
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10.53   When he says ``work out'' he means find out what it means in terms of ordinary force and particle velocity. The answer involves a familiar idea involving power which you first encountered in Physics 121. It will be helpful to look at Eq. (83).



Ross Spencer
Tue Apr 13 10:47:17 MDT 1999