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The greatest and least resultant of two ...

The greatest and least resultant of two forces are `7N` and `3N` respectively. If each of the force is increased by `3 N` and applied at `60^(@)`.The magnitude of the resultant is

A

`7 N`

B

`3 N`

C

`10 N`

D

`sqrt129N`

Text Solution

Verified by Experts

The correct Answer is:
D
`P+Q=7,P-Q=3,P^(1)=P+3,Q^(1)=Q+3`
`R=sqrt(P^(1^(2))+Q^(1^(2))+2P^(1)Q^(1)costheta)`
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Knowledge Check

  • The greatest and least resultant of two forces acting at a point are 29 kg wt. and 5 kg wt. respectively . If each force is increased by 3 kg wt. the magnitude of the resultant of new forces acting at right angles to each other is

    A
    `45 kg wt.`
    B
    `35 kg wt.`
    C
    `25 kg wt.`
    D
    `15 kg wt.`

  • The greatest and the leat resultant of two forces acting at point are 12N and 8N respectively. Find out the forces.

    A
    `12 N & 8N`
    B
    `4N&8N`
    C
    `3N&9N`
    D
    `10N&2N`

  • The resultant of two forces of 10N and 5N can never be :-

    A
    12N
    B
    5N
    C
    10N
    D
    4N
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