题目内容
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[主观题]
Two forces acting on a rigid body that has a fixed axis: （1) When these two forces are act
Two forces acting on a rigid body that has a fixed axis: (1) When these two forces are acting parallel to the axis, the combined torque to the axis is definitely zero. (2) When these two forces are acting perpendicular to the axis, the combined torque to the axis may be zero. (3) When the combined forces of these two forces is zero, their combined torque is also zero. (4) When the combined torque to the axis is zero, their combined forces is zero.
A、Only (1) is correct.
B、(1) and (2) are correct, (3) and (4) are wrong.
C、(1), (2) and (3) are correct, and (4) is wrong.
D、All (1), (2), (3) and (4) are correct.
提问人：网友joeyzhang
发布时间：2022-01-07
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