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16. | Two vectors have a resultant equal to either. The angle between them is? | |
A. | 60° | |
B. | 120° | |
C. | 90° | |
D. | 100° | |
Answer: Option B | |
Explanation: | |
R = √(P2+Q2+2PQcosθ) p2 = 2p2 (1+cosθ) 1+cosθ = 1/2 Cosθ = -1/2 = cos 120° θ = 120°. |
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