Open study

is now brainly

With Brainly you can:

  • Get homework help from millions of students and moderators
  • Learn how to solve problems with step-by-step explanations
  • Share your knowledge and earn points by helping other students
  • Learn anywhere, anytime with the Brainly app!

A community for students.

The resultant of vectors A and B has a magnitude of 20units. A has a magnitude of 8units and the angle between A and B is 40 degrees. calculate the magnitude of B?

I got my questions answered at in under 10 minutes. Go to now for free help!
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Join Brainly to access

this expert answer


To see the expert answer you'll need to create a free account at Brainly

\[(8^{2}+B^{2}+2*8*B*Cos40)=20^{2}\] Can you proceed from here finding the value of B?
Use ruler and compass. You will get the value you need, then use geometry. Either resolve your vectors or work out magnitude directly using following link:
@rs32623 which formula are u using?

Not the answer you are looking for?

Search for more explanations.

Ask your own question

Other answers:

He is using the Law of cosines I mentioned above.
i am using the formula for the resultant of two vectors A & B having magnitude A & B & angle between them if theta then the resultant is R=sqrt(A^2+B^2+2*A*B*Costheta)
i think the preferred solution is Resultant = \[sqrt{A^2 + B^2}\]
But this is true if and only if vectors A and B are at right angles.
if it is cosine rule then it should be R=sqrt(A^2+B^2-2*A*B*Costheta) you guys agree....@Vincent-Lyon.Fr @rs32623
You should end up with B = 13.20

Not the answer you are looking for?

Search for more explanations.

Ask your own question