- #26

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How many diagrams can i draw from the given question?The first one ......... there in my sketch ?

- Thread starter Benjamin_harsh
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- #26

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How many diagrams can i draw from the given question?The first one ......... there in my sketch ?

- #27

Wrichik Basu

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You can of course change that. Whatever be your choice of A and B, you will get the angle that the resultant makes with either the 4N force, or the 3N force, depending on your choice of A and B.How can you tell ##A = 4## and ##B = 3##? Why not vice versa?

For example, when you had worked out the problem, you took A=4, so you found the angle between the resultant and 4N. If you took A=3, you will find the angle between the resultant and 3N.

The mod value of the resultant remains invariant irrespective of A and B.

- #28

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What formula should i use for finding the angle between the resultant and 4N?For example, when you had worked out the problem, you took A=4, so you found the angle between the resultant and 4N. If you took A=3, you will find the angle between the resultant and 3N.

- #29

Wrichik Basu

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This:What formula should i use for finding the angle between the resultant and 4N?

##\phi## is the angle that you marked as ##q##. Basically it's the angle between ##A## and the resultant.The formula is $$\phi = \tan^{-1}\left( \frac{B \sin \theta}{A+B\cos \theta}\right)$$

You originally took ##\theta = 60°##, ##A = 4## and ##B = 3##, so you got the angle between 4N and the resultant. If you interchange A and B, you get the angle between 3N and the resultant.

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