Home
Class 11
PHYSICS
If F(1) and F(2) aare two vectors of eq...

If `F_(1) and F_(2)` aare two vectors of equal magniudes F such that `|F_(1).F_(2)|= |F_(1)xxF_(2)|, "then"|F_(1) +F_(2)|` equals to

A

`sqrt((2+sqrt(2)))F`

B

`2F`

C

`Fsqrt(2)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
(a) `F.F.costheta =F.F sin theta `or tantheta `=1or theta=45^(@)`
`|F_(1).F_(2)|=sqrt(F^(2)+F^(2)+2,FFcos 45^(@))`
`(sqrt(2+sqrt(2)))F`
Promotional Banner

Topper's Solved these Questions

  • BASIC MATHEMATICS

    DC PANDEY|Exercise Exercise|13 Videos

  • CALORIMETRY & HEAT TRANSFER

    DC PANDEY|Exercise Level 2 Subjective|14 Videos

Similar Questions

Explore conceptually related problems

If f(x)=x^(2)-x^(-2) then f((1)/(x)) is equal to

If f(x)=x^(2)-x^(-2) then f((1)/(x)) is equal to

Let f_(1):R rarr R and f_(2):C rarr C are two functions such that f_(1)(x)=x^(3) and f_(2)=x^(3) .Prove that f_(1) and f_(2) are not same.

F_(1) and F_(2) are the two foci of the ellipse (x^(2))/(9) + (y^(2))/(4) = 1. Let P be a point on the ellipse such that |PF_(1) | = 2|PF_(2)| , where F_(1) and F_(2) are the two foci of the ellipse . The area of triangle PF_(1)F_(2) is :

A deuteron and an alpha -particle are placed in an electric field.The forces acting on them are F_(1) and F_(2) and their accelerations are a_(1) and a_(2) respectively. (i) F_(1) = F_(2) (ii) F_(1) != F_(2) (iii) a_(1) = a_(2) (iv) a_(1) != a_(2)

If f(x) = (x-1)/(x+1) , then f(2) is equal to

If a function F is such that F(0)=2 , F(1)=3 , F(n+2)=2F(n)-F(n+1) for n ge 0 , then F(5) is equal to

If f(x)=(x-1)/(x+1) then f(2x) is equal to

If f(x)=(1)/(1-x), then f(f(f(x))) is equal to