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Balanced and Unbalanced Forces
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Grade Level
Grade 8
8.37 Balanced and Unbalanced Forces
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Which set of forces would keep its velocity constant (no change in speed or direction)?
A
Forces are unbalanced; net force 10 N northeast is needed to keep it moving northeast.
B
Forces are unbalanced; a 5 N force opposite the motion is needed to keep speed constant.
C
Forces are balanced; the net force must be 0 N (for example: 6 N east and 6 N west, plus 4 N north and 4 N south).
D
Forces are unbalanced; 6 N east and 4 N north will keep it moving constant northeast.
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