Physics, asked by ananyatodkar1, 4 months ago

the ratio of the magnitude of the resultant of the two vectors when they are perpendicular and when they are parallel is 1:5 the ratio of the resultant of the same two vectors when they are perpendicular and antiparallel is 3:1 . then the least integral magnitude of smaller of the two vector is ?​

Answers

Answered by saisathwikpabba038
1

Answer:

ANSWER

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

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