At a instant, the magnitudes of velocities of points [img=14x19]1803a110c41a5ac.png[/img] and [img=14x19]1803a110ccca93a.png[/img] in a plane figure are [img=19x17]1803a110d54e8f5.png[/img] and [img=19x17]1803a110de4a0df.png[/img] , respectively, and [img=61x17]1803a110e6ea33c.png[/img]. Which drawings are impossible for the velocity directions? A: [img=208x229]1803a110f15ab6d.png[/img] B: [img=210x229]1803a110fbaf808.png[/img] C: [img=215x229]1803a11105c64ec.png[/img] D: [img=208x250]1803a11111be725.png[/img]

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2022-06-07

At a instant, the magnitudes of velocities of points [img=14x19]1803a110c41a5ac.png[/img] and [img=14x19]1803a110ccca93a.png[/img] in a plane figure are [img=19x17]1803a110d54e8f5.png[/img] and [img=19x17]1803a110de4a0df.png[/img] , respectively, and [img=61x17]1803a110e6ea33c.png[/img]. Which drawings are impossible for the velocity directions? A: [img=208x229]1803a110f15ab6d.png[/img] B: [img=210x229]1803a110fbaf808.png[/img] C: [img=215x229]1803a11105c64ec.png[/img] D: [img=208x250]1803a11111be725.png[/img]

At a instant, the magnitudes of velocities of points [img=14x19]1803a110c41a5ac.png[/img] and [img=14x19]1803a110ccca93a.png[/img] in a plane figure are [img=19x17]1803a110d54e8f5.png[/img] and [img=19x17]1803a110de4a0df.png[/img] , respectively, and [img=61x17]1803a110e6ea33c.png[/img]. Which drawings are impossible for the velocity directions?
A: [img=208x229]1803a110f15ab6d.png[/img]
B: [img=210x229]1803a110fbaf808.png[/img]
C: [img=215x229]1803a11105c64ec.png[/img]
D: [img=208x250]1803a11111be725.png[/img]

答案：

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