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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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
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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