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механик энерги
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2. : . 3. :?? 4. ? ? . 5. . ? ? ? 6. .... 7. ? hmg E=mgh. 8.
h1h2 E n =mgh 1E n =mgh 2 . 9. ? . . 10. ? F=kX 11. - ?.2kx E n= 2
12. 1- - , 1, 50 . 13. .200/5020, 200400 ? . 14. E=mgh E n=kx2
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