द रिजल्टेंट वेक्टर सी आफ्टर ए एंड बी वेक्टर इस परपेंडिकुलर टो ए वेक्टर अशोक मेग्नीट्यूड आफ ए वेक्टर इज इक्वल टू सी वेक्टर्स एंगल बिटवीन ए वेक्टर एंड बी वेक्टर
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PHYSICS
The resultant of two vectors A and B is perpendicular to the vector A and its magnitude is equal to half the magnitude of vector B. The angle between A and B is
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2
B
=
A
2
+B
2
+2ABcosθ
....(i)
∴tan90
o
=
A+Bcosθ
Bsinθ
⇒A+Bcosθ=0
∴cosθ=−
B
A
Hence, from (i)
4
B
2
=A
2
+B
2
−2A
2
⇒A=
3
2
B
⇒cosθ=−
B
A
=−
2
3
∴θ=150
o
Answered By
toppr
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