Questions
The resultant of vectors A and B is R1 . On reversing the direction of vector B, the resultant becomes R2.
What is the value of ?
a
A2 + B2
b
A2 - B2
c
2(A2 + B2)
d
2 (A2 - B2)
detailed solution
Correct option is C
We have,R12 = A2+B2+2AB cos θand R22 = A2+B2+2AB cos θ∴ R12+ R22 = 2(A2+B2)Talk to our academic expert!
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(N-1) identical forces of magnitude F act simultaneously on a particle each making an angle of with the preceding one, the resultant is
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