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The object below, with mass M is pulled in the horizontal direction over a flat surface for a distance d, whose coefficient of friction is uk.2. The object below, with mass Mis pulled in the horizontal direction over a flat surface for a distance d, whose coefficient offriction is HK a. (5 points What is the total work done by friction? b. (5 points What is the change in thermal energy? 3. (5 points If both conservative forces and non-conservative forces are present, what is the relationship between the change in kinetic energy and the work done by those forces? 4. If mechanical energy is conserved, what can you say about a. (5 points the total change in mechanical energy? b. (5 points) the relationship between the work done by conservative forces and the potential energy?

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