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A force of (3 hati + 4 hatj) Newton acts...

A force of `(3 hati + 4 hatj)` Newton acts on a body and it by `(3 hati + 4 hatj)m`. The work done by the force is

A

`10 J`

B

`12 J`

C

`16 J`

D

`25 J`

Text Solution

Verified by Experts

Work done by the force is
`W = vecF. Vecd`
`= (3 hati + 4 hatj). (3 hati + 4 hatj) = 9 + 16 = 25 J`
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Knowledge Check

  • A force (3hati+4hatj) newton acts on a boby and displaces it by (3hati+4hatj) metre. The work done by the force is

    A
    5 J
    B
    25 J
    C
    10 J
    D
    30 J

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    A
    10J
    B
    12 J
    C
    19 J
    D
    25 J

  • A particle is displaced from a position (2hati - hatj+hatk) to another position (3hati+2 hatj -2hatk) under the action of the force (2 hati + hatj - hatk) . The work done by the force in arbitrary unit is

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    8
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    10
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    12
    D
    16
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