Motion in a Plane

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Question : 28
Total: 32
Can you associate vectors with (a) the length of a wire bent into a loop, (b) a plane area, (c) a sphere? Explain.
Solution:  
(a) No, we cannot associate a vector with the length of the wire bent into a loop.
(b) Yes, we can associate a vector with a plane area. The area vector is directed along normal to the plane area.
(c) No, we cannot associate a vector with a sphere.
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