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33. C although machines multiply our force
34. D when he speaks of “effort and of “work”
35. B when a force results in moving a body
36. E because it is pulled down by gravity
37. D when he speaks of “effort and of “work”
38. F that prevents the body from being moved
34. D when he speaks of “effort and of “work”
35. B when a force results in moving a body
36. E because it is pulled down by gravity
37. D when he speaks of “effort and of “work”
38. F that prevents the body from being moved
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