SSC MTS EXAM

SSC

PHYSICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Two vectors of magnitudes 25 and 15 are added together. The minimum magnitude of the resultant vector is ____
A
25
B
15
C
10
D
40
Explanation: 

Detailed explanation-1: -A vector has both magnitude and direction. For addition of vectors we need both magnitude and direction. R=√|A|2+|B|2+2|A||B|cos R = | A | 2 + | B | 2 + 2 | A | | B | cos ⁡ . Resultant is maximum when cos = 1 and it will be minimum when cos =-1.

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