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If the resultant of two forces of magnit...

If the resultant of two forces of magnitudes P and Q acting at a point at an angle of `60^@` is `sqrt7` Q, then P/Q is :

A

1

B

44230

C

2

D

4

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • Two forces of equal magnitude act simultaneously on a partical. If the resultant of the forces is equal to the magnitude of each of then the angle between the forces is

    A
    an acute angle
    B
    an obtuse angle
    C
    a right angle
    D
    of any value

  • The sum of the magnitudes of two forces acting at point is 18 and the magnitude fo their resultant is 12. If the resultant is at 90^@ with the forces of smaller magnitude, what are the, magnitudes of forces ?

    A
    12,5
    B
    14,4
    C
    5,13
    D
    10,8

  • The resultant of two forces vecF_1 and vecF_2 is P. If vecF_2 is reversed, the resultant is Q, then

    A
    `F_1^2+F_2^2=2(P^2+Q^2)`
    B
    `F_1^2-F_2^2=2(P^2+Q^2)`
    C
    `P^2+Q^2=2(F_1^2+F_2^2)`
    D
    `P^2-Q^2=2(F_1^2-F_2^2)`

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    The resultant of two forces P and Q , inclined at a fixed angle, is R which makes an angle theta with P. If P is replaced by (P+Q) keeping the direction unchaged, show that the resultant of (P+R) and Q would be inclined at (theta)/(2) with P+R.

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