Question

Given that A + B = R and A² + B² = R². The angle between
A and B is
(a) 0 (b) π/4
(c) π/2 (d) π

Answer 1

Answer:

Brainly.in

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vivacomputer8531

26.02.2019

Physics

Secondary School

+10 pts

Answered

Given that A + B = R and A = B = R. What should be the angle between A and B?(a) 0 (b) π/3(c) 2π/3 (d) π

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Answers

Gapol Ambitious

2π/3 is the correct answer to the question.

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Comments Report

qwpenguin Ace

Answer:

Explanation:

Equation 1 - A + B = R (Given)

Equation 2 - A = B = R(Given)

Using the formula for the magnitude of resultant vector -

R = √(A²+B²+2ABcosΘ)

R² =A²+B²+2ABcosΘ

As R=A=B

= R² = R²+R²+2R²cosΘ

= R² = 2R²(1+cosΘ)

= 1/2-1 =cosΘ

cosΘ=-1/2

Θ =120°

Thus the resultant angle between the vector A and B will be 120°.