Question

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Answer 1

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Answer 2

anshikapal751

Secondary SchoolPhysics 5+3 pts

Two forces 3 N & 2N are at an angle theta such that the resultant is R. The 1st force is now increased to 6 N & the resultant become 2R. Find the value of theta.

Report by Falgunichapekar 03.08.2017

Answers

anshikapal751

Anshikapal751 · Ace

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AionAbhishek

AionAbhishek Ace

Here

Formula used

R^2 = A^2 + B^2 + 2AB Cos theta

A= 3 N

B= 2 N

R^2 = 13 + 12 Cos theta

Case 2

4R^2 = 40 + 24 Cos theta

put the value of R^2

here we got

4 ( 13 + 12 Cos theta ) = 40 + 24 Cos theta

52 + 48 Cos theta = 40 + 24 Cos theta

Now 24 Cos theta = 40-52

Cos theta = -12 / 24

Cos theta = -1/2

Cos 120 degree = -1 /2

Theta = 120 degree

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