True or false: (a) The total energy of a system cannot
Chapter , Problem 3(choose chapter or problem)
True or false: (a) The total energy of a system cannot change. (b) When you jump into the air, the floor does work on you, increasing your mechanical energy. (c) Work done by frictional forces must always decrease the total mechanical energy of a system. (d) Compressing a given spring from its unstressed length takes more work than stretching it 2.0 cm from its unstressed length.
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