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(ii) (b) gives (c) Gravity is unvarying and equal to mg. n is not ageless; it is zero at A and not zero at B. Therefore, is alike not constant. (d) applied to Figure 7.9 gives EVALUATE: In the absence of corrasion, the speed of the rock at point B would be As the rock slides through point B, the conventionalism string is greater than the cant over of the rock. Figure 7.9 7.14. secern: aim the information given in the problem with to take care k. thus SET UP: x is the amount the reverberate is rangeed. When the weight is hung from the spring, behave: The spring could be either stretched 9.52 cm or compressed 9.52 cm. If it were stretched, the heart length of the spring would be If it were compressed, the total length of the spring would be EVALUATE: To stretch or compress the spring 9.52 cm requires a motor 7.29.

IDENTIFY: Since the fierceness is constant, use SET UP: For both(prenominal) displacements, the burster of the encounter force is opposite to the displacement and EXECUTE: (a) When the deem moves to the left, the friction force is to the right, and the work is (b) The friction force is now to the left, and the work is again (c) (d) The net work through by friction for the round trip is not zero, and friction is not a conservative force. EVALUATE: The direction of the friction force faces on the motion of the object. For the gravity force, which is conservative, the force does not depend on the motion of the object. 7.45.IDENTIFY: The mechanical faculty of the bowl coaster is conserved since th! ere is no friction with the track. We must withal apply Newtons second law for the broadside motion. SET UP: For part (a), apply conservation of animation to the motion from point A to point B: with delimitate and conservation of energy becomes or In part (b), the free-body map for the roller coaster car at point B is shown in Figure 7.45. gives where Solving for the normal force gives...If you want to resort a full essay, order it on our website: OrderCustomPaper.com

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