## Electromagnetic fieldsThis revised edition provides patient guidance in its clear and organized presentation of problems. It is rich in variety, large in number and provides very careful treatment of relativity. One outstanding feature is the inclusion of simple, standard examples demonstrated in different methods that will allow students to enhance and understand their calculating abilities. There are over 145 worked examples; virtually all of the standard problems are included. |

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Page 240

By analogy with similar effects involving "friction" in mechanics, we shall try to

describe the overall effect of collisions as their giving rise to a force proportional

to the

By analogy with similar effects involving "friction" in mechanics, we shall try to

describe the overall effect of collisions as their giving rise to a force proportional

to the

**velocity**and opposite to it; thus we write the mechanical force as F = — £v ...Page 546

We now want to find the components vx,Vy,vz of the

when its motion is referred to the system S. Differentiating the first expression in (

28-25) and the last in (28-28), and using (28-26), we obtain dx (dx'dt'g dt' \ ,.,„ -, ...

We now want to find the components vx,Vy,vz of the

**velocity**of this same pointwhen its motion is referred to the system S. Differentiating the first expression in (

28-25) and the last in (28-28), and using (28-26), we obtain dx (dx'dt'g dt' \ ,.,„ -, ...

Page 588

The components of v' as obtained from (A-43) are vx' = vx-vD Vy'^v, (A-53) so that

(A-51) and (A-52) can also be written as vx'-vox'coswct «/=- v0x sin uct c0x' = vax-

vD (A-54) The expressions for vx and Vy' are just those expected for a

The components of v' as obtained from (A-43) are vx' = vx-vD Vy'^v, (A-53) so that

(A-51) and (A-52) can also be written as vx'-vox'coswct «/=- v0x sin uct c0x' = vax-

vD (A-54) The expressions for vx and Vy' are just those expected for a

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