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Motion in A Plane question

2015 · Q129
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Motion in A Plane question

2015 · Q129

NEETPhysicsMotion in A PlaneMCQ+4 / −1
If vectors A→=cos⁡ωti^+sin⁡ωtj^\overrightarrow A = \cos \omega t\widehat i + \sin \omega t\widehat jA=cosωti+sinωtj​ and B→=cos⁡ωt2i^+sin⁡ωt2j^\overrightarrow B = \cos {{\omega t} \over 2}\widehat i + \sin {{\omega t} \over 2}\widehat jB=cos2ωt​i+sin2ωt​j​ are functions of time, then the value of t at which they are orthogonal to each other is
  1. A
    t=πωt = {\pi \over \omega }t=ωπ​
  2. B
    t === 0
  3. C
    t=π4ωt = {\pi \over {4\omega }}t=4ωπ​
  4. D
    t=π2ωt = {\pi \over {2\omega }}t=2ωπ​
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