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By Walter Greiner

The sequence of texts on Classical Theoretical Physics relies at the hugely winning sequence of classes given through Walter Greiner on the Johann Wolfgang Goethe college in Frankfurt am major, Germany. meant for complicated undergraduates and starting graduate scholars, the volumes within the sequence supply not just a whole survey of classical theoretical physics but in addition a tremendous variety of labored examples and difficulties to teach scholars truly tips to practice the summary ideas to lifelike difficulties.

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15). 6: Integration of a vector A = (2u 2 − 3u, 5 cos u, −3 sin u), A du = 2 3 3 2 u − u + C1 e1 + (5 sin u + C2 )e2 + (3 cos u + C3 )e3 3 2 = 2 3 3 2 u − u e1 + (5 sin u)e2 + (3 cos u)e3 + C1 e1 + C2 e2 + C3 e3 3 2 = 2 3 3 2 u − u , 5 sin u, 3 cos u 3 2 + C. The integration constants arising in the components are composed to the vector C. 7: Integration of a vector Calculate 2 A(n) dn with A = (3n 2 − 1, 2n − 3, 6n 2 − 4n). 0 2 Solution 2 A(n) dn = 0 (3n 2 − 1, 2n − 3, 6n 2 − 4n) dn 0 = (n 3 − n, n 2 − 3n, 2n 3 − 2n 2 ) = (6, −2, 8).

I b′ Graphical determination of the force: Representation by means of polygon of forces. The angle β enclosed by F and the x-axis may be calculated easily. 0) N, β c c′ d Graphical determination of the net force F. from there it follows that β = 143◦ . 0 a′ F =119N Equilibrium condition for a rigid body without fixed rotational axis A rigid body is under the action of the forces Fi at the positions ri . We investigate the equilibrium at the point A (position vector a) the body may rotate about. All forces Fi are now added and subtracted at A such that nothing is changed in total.

F p . The magnitude of M is obviously given by 35 APPLICATION IN PHYSICS M = r · F , where F = F sin ϑ is the force component perpendicular to the position vector (compare in the figure). This may also be expressed as follows: M = distance from center of rotation to action point of the force times force component perpendicular to the distance vector. 8. If one adds at the center of F Center of rotation the forces −F and F, in total 0 (compare to the rotation figure), then the forces −F at the center of rotation and F at r form a pair of forces.

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