Home
Class 11
PHYSICS
The force vec F (1) and vec F (2) are ac...

The force `vec F _(1) and vec F _(2)` are acting at right angles to each other. Then their resultant is

A

`F _(1) + F _(2)`

B

`sqrt ( vec F _(1)^(2) + vec F _(2) ^(2))`

C

`sqrt ( vec F _(1) ^(2) - vec F _(2) ^(2))`

D

`(F _(1) ^(2) - F _(2) ^(2))/( 2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`R = sqrt ( A ^(2) + B ^(2) + 2 AB cos theta )`
Here ` theta = 90^(#).`
Promotional Banner

Similar Questions

Explore conceptually related problems

In vec F=q(vecvxxvecB) , which pair of vectors are always at right angles to each other?

Two forces of 6 N and 8 N act at a point at an angle 90^@ with each other.Find the magnitude and direction fo the resultant force.

If with reference to the right handed system of mutually perpendicular unit vectors hati, hatj, hatk , vec alpha = 3hati - hatj, vec beta = 2hati + hatj - 3hatk , then express vec beta in the form vec beta = vec beta_1 + vec beta_2 where vec beta_1 is parallel to vec alpha and vec beta_2 is perpendicular to vec alpha .

If vec a=2 hat i+2 hat j+3 hat k , vec b=-hat i+2 hat j+hat k and vec c=3 hat i+hat j be such that vec a+lambda vec b is at right angles to vec c , then find lambda .

If |vec a|=10, and |vec b|=2 and vec a* vec b =12 , find angle between the two vectors