68. Numbers are used to represent the magnitudes and directions of forces that are unknown. True False 69. The free-body diagram is not important in the solution of problems in mechanics. O True O False 70. A force is a vector quantity because its effect depends only on the magnitude of the action. True False
68. Numbers are used to represent the magnitudes and directions of forces that are unknown. True False 69. The free-body diagram is not important in the solution of problems in mechanics. O True O False 70. A force is a vector quantity because its effect depends only on the magnitude of the action. True False
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Transcribed Image Text:68. Numbers are used to represent the magnitudes and directions of forces that are unknown.
True
O False
69. The free-body diagram is not important in the solution of problems in mechanics.
True
O False
70. A force is a vector quantity because its effect depends only, on the magnitude of the action.
True
False
71. Moment is a vector quantity.
True
False
72. A.B = B.A
True
O False
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