Home
Class 11
PHYSICS
Two forces of equal magnitude act at a p...

Two forces of equal magnitude act at a point making an angle `theta` with each other. If the direction of one of the forces is reversed, the direction of the resultant will turn through

A

`30^(@)`

B

`45^(@)`

C

`60^(@)`

D

`90^(@)`

Text Solution

Verified by Experts

The correct Answer is:
D

In the first case, `vec R` is the resultant of `vec P and vec Q`. It bisects the angle between `vec P and vec Q" as "|P|=|Q|`.
In the second case, `vec Q` is reversed and made `-vec Q`. Let R' be the resultant of P and -Q and its bisects the angle between `vec P and vec -Q`. The angle between R and R' is `90^(@)`. The direction of the resultant turns through `90^(@)`.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • VECTORS

    MARVEL PUBLICATION|Exercise MULTIPLE CHOICE QUESTIONS (STANDARD LEVEL)|84 Videos

  • VECTORS

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP|10 Videos

  • REFRACTION OF LIGHT

    MARVEL PUBLICATION|Exercise Test Your Grasp|10 Videos

Similar Questions

Explore conceptually related problems

Two forces of unequal magnitude simultaneously act on a particle making an angle theta (=120^(@)) with each other.If one of them is reversed ,the accelaration of the particle is become sqrt(3) times. Calculate the ratio of the magnitude of the forces.

Two vectors having equal magnitudes A make an angle theta with eahc other. Find the magnitude and direction of the resultant.

Knowledge Check

  • Two forces of equal magnitude F are at a point. If theta is the angle between two forces then magnitude of the resultant forces will be

    A
    `2Fcos""(theta)/(2)`
    B
    `Fcos""(theta)/(2)`
    C
    `2Fcostheta`
    D
    `(F)/(2)cos""(theta)/(2)`

  • Two equal forces acting at a point, at right angle to each other have a resultant of 14.14N. The magnitude of each forces is

    A
    28.28 N
    B
    24.14 N
    C
    10 N
    D
    7.07 N

  • Two forces with equal magnitudes F act on a body and the magnitude of the resultant force is F /3. The angle between the two forces is

    A
    `cos^(-1)(-(17)/(18))`
    B
    `cos^(-1)(-(1)/(3))`
    C
    `cos^(-1)((2)/(3))`
    D
    `cos^(-1)((8)/(9))`

    • Similar Questions

    Explore conceptually related problems

    Two vectors having equal magnitudes A make an angle theta with each each other.Find the magnitude and direction of the resultant.

    Two forces of magnitudes 3N and 4 N act together on an object making an angle 60^(@) with each other. Find the resultant force acting on the object.

    If two forces of equal magnitude 4 units acting at a point and the angle between them is 120^(@) , then find the magnitude of direction of the sum of the two vectors

    Two forces P and Q of magnitude 2F and 3F, respectively, are at an angle theta with each other. If the force Q is doubled, then their resultant also gets doubled. Then, the angle theta is

    Two forces each of magnitude 2N, act at an angle of 60^(@) . What is the magnitude of the resultant force ?

    Home
    Profile