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buddy#2761
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1. 1,600 joules 2. decrease; direction of the force 3. class 1 = L, F, E (or E, F, L) class 2 = F, L, E (or E, L, F) class 3 = F, E, L (or L, E, F) 4. They reduce the amount of force needed to move an object to do the same amount of work. 5. 392 Joules 6.
its 196
B.) They increase the distance over which a force is needed, doing more work with less force.